ThinkWiki - User contributions [en]

User:Profilek

2006-10-08T13:06:38Z

Profilek: a few deatils about my linux notebook plus some acpid and ipw3945d scripts

I own Lenovo ThinkPad x60s. Using Gentoo Linux I managed to have (thank to thinkwiki and [http://forums.gentoo.org Forums Gentoo]) fully working notebook under Linux:
<ul>
<li> net (e1000, ipw3945),</li>
<li> bluetooth,</li>
<li> dri - including compiz and beryl with xfce, however on battery I recommend something like Fluxbox w/o dri,</li>
<li> suspend-to-ram (Forest Zhao patches for AHCI:
[http://www.andrew.cmu.edu/user/gnychis/ahci-patch1 1],[http://www.andrew.cmu.edu/user/gnychis/ahci-patch2 2],[http://www.andrew.cmu.edu/user/gnychis/ahci-patch3 3],[http://www.andrew.cmu.edu/user/gnychis/ahci-patch4 4],[http://www.andrew.cmu.edu/user/gnychis/ahci-patch5 5],[http://www.andrew.cmu.edu/user/gnychis/ahci-patch6 6]),</li>
<li> suspend-to-disk ([http://suspend2.net suspend2.net]),</li>
<li> fingerprint,</li>
<li> hdaps,</li>
<li> extra keys (Fn+F?).</li>
</ul>

The issues which are annoying for me in Lenovo Linux support are:
<ul>
<li> much lower battery efficiency (Windows around 4h to 2.2h under Linux),</li>
<li> power drain for usb driver (bye bye fingerprint on battery),</li>
<li> higher temperatures running Linux (hence I hear the fan - quite silently but still you can hear it).</li>
</ul>

I wrote script for ipw3945d daemon. It handles loading and unloading the modules. Such behavior helps because sometimes in order to make wifi reassociate one needs to reload the modules. The script assumes that the wifi is eth1.
{{path|/etc/init.d/ipw3945d}}
PIDFILE=/var/run/ipw3945d/ipw3945d.pid

depend() {
before net
}

start() {
ebegin "Starting ipw3945d"
wifi_state=`grep '0x40:' /proc/acpi/ibm/ecdump | sed 's/ /-/g' | sed 's/\*/-/g' | cut -d '-' -f 10`
if [ $wifi_state == "02" ];
then
if lsmod | grep -q ^ipw3945;
then
ebegin "Reloading modules"
/sbin/modprobe -r --quiet ipw3945 ieee80211_crypt_wep ieee80211_crypt_tkip ieee80211_crypt_ccmp ieee80211 ieee80211_crypt
/sbin/modprobe --quiet ipw3945
eend ${?}
else
ebegin "Loading modules"
/sbin/modprobe --quiet ipw3945
eend ${?}
fi
sleep 2
start-stop-daemon --start --exec /sbin/ipw3945d --pidfile ${PIDFILE} -- \
--pid-file=${PIDFILE} ${ARGS}
eend ${?}
else
ewarn " Please switch on the wireless -- kill switch on"
eend 1
fi;
}

stop() {
ebegin "Stopping ipw3945d"
/etc/init.d/net.eth1 stop
start-stop-daemon --stop --exec /sbin/ipw3945d --pidfile ${PIDFILE}
/sbin/modprobe -r --quiet ipw3945 ieee80211_crypt_wep ieee80211_crypt_tkip ieee80211_crypt_ccmp ieee80211 ieee80211_crypt
eend ${?}
}

For this script one can add acpid actions and events scripts. It uses experimental feature of ibm-acpi module. What is different than the other script it does not need to have ipw3945 module loaded and running ipw3945d daemon, instead, it checks {{path|/proc/acpi/ibm/ecdump}} if the kill switch is on or off. This helps in power saving (wifi drains 4W :-).
{{path|/etc/acpi/actions/radio}}
#!/bin/bash
wifi_state=`grep '0x40:' /proc/acpi/ibm/ecdump | sed 's/ /-/g;s/\*/-/g' | cut -d '-' -f 10`

#echo "wifi is in " $wifi_state
if [ $wifi_state == "02" ];
then
/etc/init.d/ipw3945d --quiet start;
else
/etc/init.d/ipw3945d --quiet stop;
fi;

{{path|/etc/acpi/events/radio}}
event=ibm/hotkey HKEY 00000080 00007000
action=/etc/acpi/actions/radio

Don't forget to set proper permissions for {{path|/etc/acpi/actions/radio}}.

Problem with high pitch noises

2006-05-28T17:06:03Z

Profilek: /* Upgrade the bios */

Information on strange high pitch, low volume noises emitted by ThinkPads.

==Problem description==
Even though ThinkPads are known as very silent notebooks, they tend to emit different, mostly high pitch noises in certain circumstances. The noises are of low volume and hence not realized by everyone or at least tolerated by most people. However, there are those with "bat like ears" that hear them and might be annoyed by that.

==Affected Models==
Noises have been experienced in the following situations:
{| border="1" cellspacing="0" cellpadding="2"
|-
! style="vertical-align:top;background-color:#DDDDDD;" | situation
! style="vertical-align:top;background-color:#DDDDDD;" | noise description
! style="vertical-align:top;background-color:#DDDDDD;" | affected models
|-
| style="vertical-align:top;" |
Plugged into AC / running at high CPU frequency
| style="vertical-align:top;" |
soft crackling, buzzing noise
| style="vertical-align:top;" |
*{{T41}}
**2379-DJU
|-
| style="vertical-align:top;" |
ThinkPad suspended to RAM
| style="vertical-align:top;" |
constant high pitch noise
| style="vertical-align:top;" |
*{{T42p}}
|-
| style="vertical-align:top;" |
ThinkPad connected to power and switched off, with battery fully charged
| style="vertical-align:top;" |
constant high pitch noise
| style="vertical-align:top;" |
*{{T41p}}
**2373-GHG
|-
| style="vertical-align:top;" |
moving windows or just the mouse in xorg
| style="vertical-align:top;" |
strange noise like a rapid series of very short high pitch noises adding to a constant kind of whistling (only as long as the movement goes)
| style="vertical-align:top;" |
*{{T41p}}
**2373-GHG
|-
| style="vertical-align:top;" |
Thinkpad connected to power or working on battery, also when suspended to RAM
| style="vertical-align:top;" |
High pitch noise also when HD is powered down.
| style="vertical-align:top;" |
*{{T23}}
**2647-DG4
*{{X24}}
**2662-MWG
|-
| style="vertical-align:top;" |
Thinkpad connected to power battery charged less than 60%
| style="vertical-align:top;" |
High pitch noise till battery is charged more than 60%.
| style="vertical-align:top;" |
*{{T41p}}
**2373-GEG
|-
| style="vertical-align:top;" |
Constantly, if AC connected
| style="vertical-align:top;" |
High pitched, low volume constant noise.
| style="vertical-align:top;" |
*{{T40}}
**2373-88U
|-
| style="vertical-align:top;" |
When the CPU freq jumps up to 1Ghz or above, or when the laptop is in suspend mode
| style="vertical-align:top;" |
Constant high pitched
| style="vertical-align:top;" |
*{{R50}}
**1829-6DM
|-
| style="vertical-align:top;" |
(May come from harddisk.)
| style="vertical-align:top;" |
continuous, intermittent, low volume, high pitched
| style="vertical-align:top;" |
*{{600X}}
|-
| style="vertical-align:top;" |
ACPI puts the processor into the C3 or C4 power saving states (i.e., the system is idle).
| style="vertical-align:top;" |
High-pitched crackling noise.
| style="vertical-align:top;" |
*{{X41}}
*{{T43}}
**2686-DGU
*{{T43p}}
*{{T21}}
|-
| style="vertical-align:top;" |
Cpufreqd (or powernowd etc.) slows down the processor, for exemple at the end of an heavy task.
| style="vertical-align:top;" |
High-pitched crackling noise.
| style="vertical-align:top;" |
*{{T42}}
|-
| style="vertical-align:top;" |
When on battery
| style="vertical-align:top;" |
Almost inaudible screeching sound, or sometimes beeping (when wifi is on)
| style="vertical-align:top;" |
*{{R52}}
**1858-A11
*{{T43}}
**2686-DGU
*{{x60}}

|-
| CPU is used much AND laptop is on AC power AND the TFT panel is enabled.
| Screetching high pitch noise, like a million crickets
|
* {{X41}}
|}

==Affected Operating Systems==
All, though Linux appears especially susceptible.

==Possible sources==

* '''CPU activity:''' On some models the noise is triggered by certain CPU power states or activity patterns (as proven [http://www.wisdom.weizmann.ac.il/~tromer/acoustic here]).
* '''Graphics processor:''' In some models from the T2x era, e.g. the {{T23}}, the problem was related to the graphics circuitry and occured especially or only while making use of DirectDraw functions. IBM was able to fix it through a BIOS upgrade.
* '''Hard disk:''' On some ThinkPads the processor and hard disk are adjacent and produce similar noise. For example, in the {{X41}} the sound generated by the hard disk is likely to be loudest at the vent.

==Status==

The problem is highly specific to operating system, model and even individual machines. There is no universal solution, but on most machines one of the following will reduce or eliminate the noise (possibly at some cost in power consumption).

==Solutions for CPU-triggered noise==

===Limit ACPI CPU power states===

There are four ACPI CPU power states, called C1 through C4. Often only the extreme power saving modes C4 or C3 produce the noise, so the noise can be stopped by insructing the Linux ACPI code to use only lower modes.

To forbid the ACPI driver from using C4 (this fixed the problem with on some ThinkPad {{T43}}, {{T43p}} and {{T41}}):
* If the ACPI processor component is compiled as built-in (<tt>CONFIG_ACPI_PROCESSOR=y</tt>):
**Pass the {{bootparm|max_cstate|3}} kernel argument.
* If the ACPI processor component is loaded as a module (<tt>CONFIG_ACPI_PROCESSOR=m</tt> and <tt>processor</tt> shows in the output of {{cmdroot|lsmod}}), do either of:
** Pass the {{bootparm|processor.max_cstate|3}} kernel argument (this does not work in Ubuntu 5.10 with default kernel).
** Add <code>options processor max_cstate=3</code> to {{path|/etc/modprobe.conf}} (or {{path|/etc/modprobe.conf.local}}, or {{path|/etc/modprobe.d/...}}, depending on your system) (this does not work in Ubuntu 5.10 with default kernel).
** {{cmdroot|echo 3 > /sys/module/processor/parameters/max_cstate}} (this can be changed in runtime for experimentation). (If may need to be set again upon resume from suspend, e.g., in the wakeup script.)
** (On Ubuntu 5.10, the default kernel uses <code>processor</code> as a module. Unfortunately, the script loading it, {{path|/etc/init.d/acpid}}, ignores the <code>options processor max_cstate=3</code> setting in {{path|/etc/modprobe.d/<my file>}}. As a solution for this specific problem, add the line <code>echo 2 > /sys/module/processor/parameters/max_cstate</code> directly to {{path|/etc/init.d/acpid}}, at the end of the function <code>load_modules()</code>, immediately after the line <code>echo "$PRINTK" > /proc/sys/kernel/printk</code>.)

To also forbid the C3 state, replace "<tt>3</tt>" with "<tt>2</tt>" above (this fixed the problem on some ThinkPad {{X40}}, {{X41}}, and {{R52}}):

Note that these options affect power consumption when the CPU is idle. For example, here are the power consumption figures on a ThinkPad {{T43}}:
* {{bootparm|processor.max_cstate|4}}: 15160mW (default, noisy)
* {{bootparm|processor.max_cstate|3}}: 15770mW (660mW higher, silent)
* {{bootparm|processor.max_cstate|2}}: 16100mW (2940mW higher, silent)

See the [http://thinkwiki.org/wiki?title=Talk:Problem_with_high_pitch_noises discussion page] for further information and success reports.

*Jakob Schou Pedersen: Editing the file {{path|/etc/init.d/acpid}} as described above (the last solution) worked on my T43 :-)

===Turn off CPU power saving in in BIOS===

Go into the BIOS and turn off the power saving processor feature that puts it into idle mode. (This worked on a ThinkPad {{T43}}, {{T21}} and {{X60s}}.)

===Disable ACPI CPU power states===

Completely disable CPU ACPI power states. Discussion:

*From Martin Steigerwald: I made the observation that I get at least less high pitch noises on my {{T23}} when I do not use the two ACPI modules "processor" and "thermal" (depends on the first one). I have no clue, why. Anyone with similar experiences?
:Omar Yasin: I've got a {{R52}} and when I load the same ACPIO modules the high pitch noises are not as loud but I can still hear them.
*Niko Ehrenfeuchter: I'm experiencing the same here on my {{X24}}. Removing the "processor" module also stops the pitch noise, which does ONLY occur when setting the CPU to maximum speed (using cpufreq). On low speed it's completely silent, even having loaded the processor module.

*Rolf Adelsberger: I can confirm this: the high pitch noise is only remarkable (at least with my ears ;-) ) if the processor speed is set to maximum frequency.

*Stefan Baums: My {{X41}} produced a high-pitched crackle from the processor vent on the left. Changing HZ did nothing, and the 'processor' module could not easily be removed from the system (Ubuntu 5.04). What solved the problem for me was adding {{bootparm|idle|halt}} to the boot command line. Unfortunately, this solution only lasts until the first hibernation or suspend - when the computer ({{X41}}) resumes, the high-pitched crackle is back.

* The {{bootparm|idle|halt}} solution combined with setting <code>#define HZ 100</code> in the kernel fixes the problem on a {{T43}}.

* jhatch: {{bootparm|idle|halt}} plus <code>#define HZ 100</code> also worked on my {{T43}}. It still reverts back to noisy after a suspend/resume though. This needs to be fixed...

===Change the timer interrupt frequency===

Change the "HZ" kernel constants to alter the frequency of timer interrupts. Discussion:

{{NOTE|The timer interrupt frequency (HZ) in current Linux kernels is directly tied to the kernel task scheduler. Lower frequencies provide larger time-slices and thus also higher latencies (which may kill latency-sensitive applications like audio processing). 100Hz ended up as the recommended "server" setting (because it increases disk/CPU throughput in a latency-insensitive environment). Higher frequencies are better for latency-sensitive applications, and improve desktop responsivity at the cost of less processor throughput. 1000Hz ended up as the recommended "desktop" setting.}}

*Andreas Karnahl: i've read in several forums it has something to do with the "idle"-state (or "C3") of the processor. There is a frequency called "timer interrupt" (or so mething like that). Since kernel 2.6x it is set to 1000 Hz by default (compared to 100 Hz in Kernel 2.4x). The exact reason i don't know, but it is safe to change this frequency to 100 Hz in kernel 2.6x (by the way, windows up to XP uses 100 Hz by default). Just do the following: 
: In {{path|[path to kernel-sources]/include/asm-i386/param.h}} find the line
:: <code>#define HZ 1000</code>
: and change the value of HZ to 100:
:: <code>#define HZ 100</code>
:Then recompile the kernel. After i changed it on my ThinkPad {{A30}} (under SuSE 9.2 and 9.3) and recompiling the kernel the high pitch noise is gone away.

* Omar Yasin: Worked on my {{R52}}, thanks.

* [[User:Thinker|Thinker]]: In modern kernels this constant is in the kernel configuration {{kernelconf|CONFIG_HZ|Processor type and features||Timer Frequency|||||}}.

===Prevent idling===

Indirectly avoid power saving states by making sure the CPU is rarely idle:

* Paul RIVIER: Here is a really simple workaround. C3 / C4 states are mainly called when the cpu freq is higher than required, for example if your cpufreqd is lazy to slow down the frequency but quick to raise it. That is why I use powernowd with the builtin "passive" mode, which is lazy for raising frequency, but quick to go back to the lowest. Now I don't hear them as often as before, as I avoid C3/C4 states at high frequency.

* The problem also occurs on my {{X41}} with 2.6.11. Setting up [[How to make use of Dynamic Frequency Scaling|frequency scaling]] with the <code>ondemand</code> governor makes things a lot better, as the processor does not stay with the maximum frequency when in idle mode. It can be still heard sometimes, though.

* On a {{T43}} the noise was gone after dropping cpufreqd and switching to the ondemand governor - maybe because of the high sampling rate? (used the default: 10ms)

===Change the processor voltage===

Reducing the processor voltage (when possible) may decrease or eliminate the noise. On one ThinkPad {{T43}}, [[Pentium M undervolting and underclocking|undervolting the Pentium M processor]] eliminated the high-pitched noise. Compared to the other solutions this has the benefit of lower power consumption, both due to the undervolting itself and because there is no need to forbid high APCI CPU power saving modes.

==Other solutions==

===Disable UltraBay===
*Naheed Vora: My {{T41}} (2373-268) started to give high pitch noise ocassionally, when I upgraded to 2.6.11 kernel. I tried to unload lot of modules but finally figured out that disabling bay stops the noise. If you have [[ibm-acpi]], do (need a cleaner solution): {{cmduser|echo eject >/proc/acpi/ibm/bay}} .

===Disable IrDA===
*Mike Perry: I was able to cure an intermittent high-pitched whine on both my {{X24}} and {{X40}} by disabling the Infrared port.

===Disable the Linuxant Modem Driver===
*Joern Heissler: I made another experience. I played around with linuxant conexant [[Modem Devices|modem]] drivers. After loading them I got some noise on my {{T42p}}.

===Media Player paused===
*Eilif Muller: On my {{R52}} the high-pitched noises go away if I load XMMS, play something then pause it.
*Jacob: On my {{T43}} DGU it goes away if I open mplayerc.exe and press play then pause it. This is the high-pitched noise that only shows up when I'm on battery.

''I'd guess that the above tip works as when xmms or similar is running, it is uncompressing compressed audio/video, which is a processor intensive action. Keeping this paused means that the app won't 'let go' of the processor, forcing it to stay up and running, which stops it entering the higher powersave modes.''

===Upgrade BIOS===
With X60s I upgrade bios to version 1.06 and the high pitch noise when running on battery will disappear. [http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-63144 Here] is the link.

Problem with high pitch noises

2006-05-28T17:05:13Z

Profilek:

Information on strange high pitch, low volume noises emitted by ThinkPads.

==Problem description==
Even though ThinkPads are known as very silent notebooks, they tend to emit different, mostly high pitch noises in certain circumstances. The noises are of low volume and hence not realized by everyone or at least tolerated by most people. However, there are those with "bat like ears" that hear them and might be annoyed by that.

==Affected Models==
Noises have been experienced in the following situations:
{| border="1" cellspacing="0" cellpadding="2"
|-
! style="vertical-align:top;background-color:#DDDDDD;" | situation
! style="vertical-align:top;background-color:#DDDDDD;" | noise description
! style="vertical-align:top;background-color:#DDDDDD;" | affected models
|-
| style="vertical-align:top;" |
Plugged into AC / running at high CPU frequency
| style="vertical-align:top;" |
soft crackling, buzzing noise
| style="vertical-align:top;" |
*{{T41}}
**2379-DJU
|-
| style="vertical-align:top;" |
ThinkPad suspended to RAM
| style="vertical-align:top;" |
constant high pitch noise
| style="vertical-align:top;" |
*{{T42p}}
|-
| style="vertical-align:top;" |
ThinkPad connected to power and switched off, with battery fully charged
| style="vertical-align:top;" |
constant high pitch noise
| style="vertical-align:top;" |
*{{T41p}}
**2373-GHG
|-
| style="vertical-align:top;" |
moving windows or just the mouse in xorg
| style="vertical-align:top;" |
strange noise like a rapid series of very short high pitch noises adding to a constant kind of whistling (only as long as the movement goes)
| style="vertical-align:top;" |
*{{T41p}}
**2373-GHG
|-
| style="vertical-align:top;" |
Thinkpad connected to power or working on battery, also when suspended to RAM
| style="vertical-align:top;" |
High pitch noise also when HD is powered down.
| style="vertical-align:top;" |
*{{T23}}
**2647-DG4
*{{X24}}
**2662-MWG
|-
| style="vertical-align:top;" |
Thinkpad connected to power battery charged less than 60%
| style="vertical-align:top;" |
High pitch noise till battery is charged more than 60%.
| style="vertical-align:top;" |
*{{T41p}}
**2373-GEG
|-
| style="vertical-align:top;" |
Constantly, if AC connected
| style="vertical-align:top;" |
High pitched, low volume constant noise.
| style="vertical-align:top;" |
*{{T40}}
**2373-88U
|-
| style="vertical-align:top;" |
When the CPU freq jumps up to 1Ghz or above, or when the laptop is in suspend mode
| style="vertical-align:top;" |
Constant high pitched
| style="vertical-align:top;" |
*{{R50}}
**1829-6DM
|-
| style="vertical-align:top;" |
(May come from harddisk.)
| style="vertical-align:top;" |
continuous, intermittent, low volume, high pitched
| style="vertical-align:top;" |
*{{600X}}
|-
| style="vertical-align:top;" |
ACPI puts the processor into the C3 or C4 power saving states (i.e., the system is idle).
| style="vertical-align:top;" |
High-pitched crackling noise.
| style="vertical-align:top;" |
*{{X41}}
*{{T43}}
**2686-DGU
*{{T43p}}
*{{T21}}
|-
| style="vertical-align:top;" |
Cpufreqd (or powernowd etc.) slows down the processor, for exemple at the end of an heavy task.
| style="vertical-align:top;" |
High-pitched crackling noise.
| style="vertical-align:top;" |
*{{T42}}
|-
| style="vertical-align:top;" |
When on battery
| style="vertical-align:top;" |
Almost inaudible screeching sound, or sometimes beeping (when wifi is on)
| style="vertical-align:top;" |
*{{R52}}
**1858-A11
*{{T43}}
**2686-DGU
*{{x60}}

|-
| CPU is used much AND laptop is on AC power AND the TFT panel is enabled.
| Screetching high pitch noise, like a million crickets
|
* {{X41}}
|}

==Affected Operating Systems==
All, though Linux appears especially susceptible.

==Possible sources==

* '''CPU activity:''' On some models the noise is triggered by certain CPU power states or activity patterns (as proven [http://www.wisdom.weizmann.ac.il/~tromer/acoustic here]).
* '''Graphics processor:''' In some models from the T2x era, e.g. the {{T23}}, the problem was related to the graphics circuitry and occured especially or only while making use of DirectDraw functions. IBM was able to fix it through a BIOS upgrade.
* '''Hard disk:''' On some ThinkPads the processor and hard disk are adjacent and produce similar noise. For example, in the {{X41}} the sound generated by the hard disk is likely to be loudest at the vent.

==Status==

The problem is highly specific to operating system, model and even individual machines. There is no universal solution, but on most machines one of the following will reduce or eliminate the noise (possibly at some cost in power consumption).

==Solutions for CPU-triggered noise==

===Limit ACPI CPU power states===

There are four ACPI CPU power states, called C1 through C4. Often only the extreme power saving modes C4 or C3 produce the noise, so the noise can be stopped by insructing the Linux ACPI code to use only lower modes.

To forbid the ACPI driver from using C4 (this fixed the problem with on some ThinkPad {{T43}}, {{T43p}} and {{T41}}):
* If the ACPI processor component is compiled as built-in (<tt>CONFIG_ACPI_PROCESSOR=y</tt>):
**Pass the {{bootparm|max_cstate|3}} kernel argument.
* If the ACPI processor component is loaded as a module (<tt>CONFIG_ACPI_PROCESSOR=m</tt> and <tt>processor</tt> shows in the output of {{cmdroot|lsmod}}), do either of:
** Pass the {{bootparm|processor.max_cstate|3}} kernel argument (this does not work in Ubuntu 5.10 with default kernel).
** Add <code>options processor max_cstate=3</code> to {{path|/etc/modprobe.conf}} (or {{path|/etc/modprobe.conf.local}}, or {{path|/etc/modprobe.d/...}}, depending on your system) (this does not work in Ubuntu 5.10 with default kernel).
** {{cmdroot|echo 3 > /sys/module/processor/parameters/max_cstate}} (this can be changed in runtime for experimentation). (If may need to be set again upon resume from suspend, e.g., in the wakeup script.)
** (On Ubuntu 5.10, the default kernel uses <code>processor</code> as a module. Unfortunately, the script loading it, {{path|/etc/init.d/acpid}}, ignores the <code>options processor max_cstate=3</code> setting in {{path|/etc/modprobe.d/<my file>}}. As a solution for this specific problem, add the line <code>echo 2 > /sys/module/processor/parameters/max_cstate</code> directly to {{path|/etc/init.d/acpid}}, at the end of the function <code>load_modules()</code>, immediately after the line <code>echo "$PRINTK" > /proc/sys/kernel/printk</code>.)

To also forbid the C3 state, replace "<tt>3</tt>" with "<tt>2</tt>" above (this fixed the problem on some ThinkPad {{X40}}, {{X41}}, and {{R52}}):

Note that these options affect power consumption when the CPU is idle. For example, here are the power consumption figures on a ThinkPad {{T43}}:
* {{bootparm|processor.max_cstate|4}}: 15160mW (default, noisy)
* {{bootparm|processor.max_cstate|3}}: 15770mW (660mW higher, silent)
* {{bootparm|processor.max_cstate|2}}: 16100mW (2940mW higher, silent)

See the [http://thinkwiki.org/wiki?title=Talk:Problem_with_high_pitch_noises discussion page] for further information and success reports.

*Jakob Schou Pedersen: Editing the file {{path|/etc/init.d/acpid}} as described above (the last solution) worked on my T43 :-)

===Turn off CPU power saving in in BIOS===

Go into the BIOS and turn off the power saving processor feature that puts it into idle mode. (This worked on a ThinkPad {{T43}}, {{T21}} and {{X60s}}.)

===Disable ACPI CPU power states===

Completely disable CPU ACPI power states. Discussion:

*From Martin Steigerwald: I made the observation that I get at least less high pitch noises on my {{T23}} when I do not use the two ACPI modules "processor" and "thermal" (depends on the first one). I have no clue, why. Anyone with similar experiences?
:Omar Yasin: I've got a {{R52}} and when I load the same ACPIO modules the high pitch noises are not as loud but I can still hear them.
*Niko Ehrenfeuchter: I'm experiencing the same here on my {{X24}}. Removing the "processor" module also stops the pitch noise, which does ONLY occur when setting the CPU to maximum speed (using cpufreq). On low speed it's completely silent, even having loaded the processor module.

*Rolf Adelsberger: I can confirm this: the high pitch noise is only remarkable (at least with my ears ;-) ) if the processor speed is set to maximum frequency.

*Stefan Baums: My {{X41}} produced a high-pitched crackle from the processor vent on the left. Changing HZ did nothing, and the 'processor' module could not easily be removed from the system (Ubuntu 5.04). What solved the problem for me was adding {{bootparm|idle|halt}} to the boot command line. Unfortunately, this solution only lasts until the first hibernation or suspend - when the computer ({{X41}}) resumes, the high-pitched crackle is back.

* The {{bootparm|idle|halt}} solution combined with setting <code>#define HZ 100</code> in the kernel fixes the problem on a {{T43}}.

* jhatch: {{bootparm|idle|halt}} plus <code>#define HZ 100</code> also worked on my {{T43}}. It still reverts back to noisy after a suspend/resume though. This needs to be fixed...

===Change the timer interrupt frequency===

Change the "HZ" kernel constants to alter the frequency of timer interrupts. Discussion:

{{NOTE|The timer interrupt frequency (HZ) in current Linux kernels is directly tied to the kernel task scheduler. Lower frequencies provide larger time-slices and thus also higher latencies (which may kill latency-sensitive applications like audio processing). 100Hz ended up as the recommended "server" setting (because it increases disk/CPU throughput in a latency-insensitive environment). Higher frequencies are better for latency-sensitive applications, and improve desktop responsivity at the cost of less processor throughput. 1000Hz ended up as the recommended "desktop" setting.}}

*Andreas Karnahl: i've read in several forums it has something to do with the "idle"-state (or "C3") of the processor. There is a frequency called "timer interrupt" (or so mething like that). Since kernel 2.6x it is set to 1000 Hz by default (compared to 100 Hz in Kernel 2.4x). The exact reason i don't know, but it is safe to change this frequency to 100 Hz in kernel 2.6x (by the way, windows up to XP uses 100 Hz by default). Just do the following: 
: In {{path|[path to kernel-sources]/include/asm-i386/param.h}} find the line
:: <code>#define HZ 1000</code>
: and change the value of HZ to 100:
:: <code>#define HZ 100</code>
:Then recompile the kernel. After i changed it on my ThinkPad {{A30}} (under SuSE 9.2 and 9.3) and recompiling the kernel the high pitch noise is gone away.

* Omar Yasin: Worked on my {{R52}}, thanks.

* [[User:Thinker|Thinker]]: In modern kernels this constant is in the kernel configuration {{kernelconf|CONFIG_HZ|Processor type and features||Timer Frequency|||||}}.

===Prevent idling===

Indirectly avoid power saving states by making sure the CPU is rarely idle:

* Paul RIVIER: Here is a really simple workaround. C3 / C4 states are mainly called when the cpu freq is higher than required, for example if your cpufreqd is lazy to slow down the frequency but quick to raise it. That is why I use powernowd with the builtin "passive" mode, which is lazy for raising frequency, but quick to go back to the lowest. Now I don't hear them as often as before, as I avoid C3/C4 states at high frequency.

* The problem also occurs on my {{X41}} with 2.6.11. Setting up [[How to make use of Dynamic Frequency Scaling|frequency scaling]] with the <code>ondemand</code> governor makes things a lot better, as the processor does not stay with the maximum frequency when in idle mode. It can be still heard sometimes, though.

* On a {{T43}} the noise was gone after dropping cpufreqd and switching to the ondemand governor - maybe because of the high sampling rate? (used the default: 10ms)

===Change the processor voltage===

Reducing the processor voltage (when possible) may decrease or eliminate the noise. On one ThinkPad {{T43}}, [[Pentium M undervolting and underclocking|undervolting the Pentium M processor]] eliminated the high-pitched noise. Compared to the other solutions this has the benefit of lower power consumption, both due to the undervolting itself and because there is no need to forbid high APCI CPU power saving modes.

==Other solutions==

===Disable UltraBay===
*Naheed Vora: My {{T41}} (2373-268) started to give high pitch noise ocassionally, when I upgraded to 2.6.11 kernel. I tried to unload lot of modules but finally figured out that disabling bay stops the noise. If you have [[ibm-acpi]], do (need a cleaner solution): {{cmduser|echo eject >/proc/acpi/ibm/bay}} .

===Disable IrDA===
*Mike Perry: I was able to cure an intermittent high-pitched whine on both my {{X24}} and {{X40}} by disabling the Infrared port.

===Disable the Linuxant Modem Driver===
*Joern Heissler: I made another experience. I played around with linuxant conexant [[Modem Devices|modem]] drivers. After loading them I got some noise on my {{T42p}}.

===Media Player paused===
*Eilif Muller: On my {{R52}} the high-pitched noises go away if I load XMMS, play something then pause it.
*Jacob: On my {{T43}} DGU it goes away if I open mplayerc.exe and press play then pause it. This is the high-pitched noise that only shows up when I'm on battery.

''I'd guess that the above tip works as when xmms or similar is running, it is uncompressing compressed audio/video, which is a processor intensive action. Keeping this paused means that the app won't 'let go' of the processor, forcing it to stay up and running, which stops it entering the higher powersave modes.''

===Upgrade the bios===
With X60s I upgrade bios to version 1.06 and the high pitch noise when running on battery will disappear. [http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-63144 Here] is the link.

Supported Boot Devices

2006-04-23T14:15:04Z

Profilek: /* X Series */

{| width="100%"
|style="vertical-align:top;padding-right:20px;width:10px;white-space:nowrap;" | __TOC__
|style="vertical-align:top" |
The following table headings shall designate the following meanings...

* FDD = Internal/UltraBay Diskette ("Floppy") drive (also called "Legacy FDD")
* CD = Internal/UltraBay CD/DVD(-R/-RW/-RAM) drive
* Network = any type of network boot support (such as PXE)
* PCMCIA = any memory device connected via the PCMCIA/PC Card/CardBus port
* USB HD = any hard drive/flash drive/pen drive connected via the USB port
* USB FDD = Diskette ("Floppy") drive connected via the USB port
* USB CD = CD/DVD(-R/-RW/-RAM) drive connected via the USB port
* FireWire = any memory device connected via the FireWire (i.Link/IEEE 1394) port

The fields should be filled with one of the following:
* ? = unknown / untested
* yes = supported (may be selected from the BIOS)
* no = not supported (BIOS incapable of booting to this type of device)
* part = partially working (configuration not retained on reboot/requires firmware workaround/only on some devices/USB1 only). Please add footnote/link documenting the specifics.
* v#.## = only with BIOS versions ≥ #.##
* N/A = not applicable
|}

{| border="1" cellspacing="0" cellpadding="2"
|-
! colspan="9" style="text-align:center;background:#efefef;" |
====Numbered Series====
|-
! style="vertical-align:top;background-color:#cfefcf;" | Model
! style="vertical-align:top;background-color:#6699cc;" | FDD
! style="vertical-align:top;background-color:#6699cc;" | CD
! style="vertical-align:top;background-color:#6699cc;" | Network
! style="vertical-align:top;background-color:#6699cc;" | PCMCIA
! style="vertical-align:top;background-color:#6699cc;" | USB HD
! style="vertical-align:top;background-color:#6699cc;" | USB FDD
! style="vertical-align:top;background-color:#6699cc;" | USB CD
! style="vertical-align:top;background-color:#6699cc;" | FireWire HD
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:570 | 570]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:570E | 570E]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:600 | 600]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | yes{{footnote|5}}
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:600E | 600E]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:600X | 600X]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:755CD | 755CD]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:755CDV | 755CDV]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:755CV | 755CV]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:755CX | 755CX]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:770 | 770]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:770E | 770E]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:770X | 770X]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:770Z | 770Z]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
! colspan="9" style="text-align:center;background:#efefef;" |

====A Series====
|-
! style="vertical-align:top;background-color:#cfefcf;" | Model
! style="vertical-align:top;background-color:#6699cc;" | FDD
! style="vertical-align:top;background-color:#6699cc;" | CD
! style="vertical-align:top;background-color:#6699cc;" | Network
! style="vertical-align:top;background-color:#6699cc;" | PCMCIA
! style="vertical-align:top;background-color:#6699cc;" | USB HD
! style="vertical-align:top;background-color:#6699cc;" | USB FDD
! style="vertical-align:top;background-color:#6699cc;" | USB CD
! style="vertical-align:top;background-color:#6699cc;" | FireWire HD
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A20m | A20m]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | no 
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A20p | A20p]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A21e | A21e]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A21m | A21m]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A21p | A21p]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A22e | A22e]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A22m | A22m]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | no 
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A22p | A22p]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A30 | A30]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | no 
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A30p | A30p]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A31 | A31]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes 
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:A31p | A31p]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
! colspan="9" style="text-align:center;background:#efefef;" |

====G Series====
|-
! style="vertical-align:top;background-color:#cfefcf;" | Model
! style="vertical-align:top;background-color:#6699cc;" | FDD
! style="vertical-align:top;background-color:#6699cc;" | CD
! style="vertical-align:top;background-color:#6699cc;" | Network
! style="vertical-align:top;background-color:#6699cc;" | PCMCIA
! style="vertical-align:top;background-color:#6699cc;" | USB HD
! style="vertical-align:top;background-color:#6699cc;" | USB FDD
! style="vertical-align:top;background-color:#6699cc;" | USB CD
! style="vertical-align:top;background-color:#6699cc;" | FireWire HD
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:G40 | G40]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:G41 | G41]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
! colspan="9" style="text-align:center;background:#efefef;" |

====R Series====
|-
! style="vertical-align:top;background-color:#cfefcf;" | Model
! style="vertical-align:top;background-color:#6699cc;" | FDD
! style="vertical-align:top;background-color:#6699cc;" | CD
! style="vertical-align:top;background-color:#6699cc;" | Network
! style="vertical-align:top;background-color:#6699cc;" | PCMCIA
! style="vertical-align:top;background-color:#6699cc;" | USB HD
! style="vertical-align:top;background-color:#6699cc;" | USB FDD
! style="vertical-align:top;background-color:#6699cc;" | USB CD
! style="vertical-align:top;background-color:#6699cc;" | FireWire HD
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R30 | R30]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R31 | R31]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | no 
| style="vertical-align:middle;text-align:center;" | yes 
| style="vertical-align:middle;text-align:center;" | no 
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R32 | R32]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R40 | R40]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R40e | R40e]]
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R50 | R50]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R50e | R50e]]
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R50p | R50p]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R51 | R51]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:R52 | R52]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
! colspan="9" style="text-align:center;background:#efefef;" |

====T Series====
|-
! style="vertical-align:top;background-color:#cfefcf;" | Model
! style="vertical-align:top;background-color:#6699cc;" | FDD
! style="vertical-align:top;background-color:#6699cc;" | CD
! style="vertical-align:top;background-color:#6699cc;" | Network
! style="vertical-align:top;background-color:#6699cc;" | PCMCIA
! style="vertical-align:top;background-color:#6699cc;" | USB HD
! style="vertical-align:top;background-color:#6699cc;" | USB FDD
! style="vertical-align:top;background-color:#6699cc;" | USB CD
! style="vertical-align:top;background-color:#6699cc;" | FireWire HD
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T20 | T20]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T21 | T21]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | no
| style="vertical-align:middle;text-align:center;" | no
| style="vertical-align:middle;text-align:center;" | no
| style="vertical-align:middle;text-align:center;" | no
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T22 | T22]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T23 | T23]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes{{footnote|4}}
| style="vertical-align:middle;text-align:center;" | yes 
| style="vertical-align:middle;text-align:center;" | yes 
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T30 | T30]]
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T40 | T40]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | no
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T40p | T40p]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T41 | T41]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T41p | T41p]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T42 | T42]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T42p | T42p]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T43 | T43]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T43p | T43p]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|3}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:T60 | T60]]
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
! colspan="9" style="text-align:center;background:#efefef;" |

====X Series====
|-
! style="vertical-align:top;background-color:#cfefcf;" | Model
! style="vertical-align:top;background-color:#6699cc;" | FDD
! style="vertical-align:top;background-color:#6699cc;" | CD
! style="vertical-align:top;background-color:#6699cc;" | Network
! style="vertical-align:top;background-color:#6699cc;" | PCMCIA
! style="vertical-align:top;background-color:#6699cc;" | USB HD
! style="vertical-align:top;background-color:#6699cc;" | USB FDD
! style="vertical-align:top;background-color:#6699cc;" | USB CD
! style="vertical-align:top;background-color:#6699cc;" | FireWire HD
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X20 | X20]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | no
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X21 | X21]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | no
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X22 | X22]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X23 | X23]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X24 | X24]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X30 | X30]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | part{{footnote|1}}
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X31 | X31]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X32 | X32]]
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X40 | X40]]
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X41 | X41]]
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X41 Tablet | X41 Tablet]]
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | yes{{footnote|2}}
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X41 Tablet | X60]]
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X41 Tablet | X60s]]
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|-
! colspan="9" style="text-align:center;background:#efefef;" |

====Z Series====
|-
! style="vertical-align:top;background-color:#cfefcf;" | Model
! style="vertical-align:top;background-color:#6699cc;" | FDD
! style="vertical-align:top;background-color:#6699cc;" | CD
! style="vertical-align:top;background-color:#6699cc;" | Network
! style="vertical-align:top;background-color:#6699cc;" | PCMCIA
! style="vertical-align:top;background-color:#6699cc;" | USB HD
! style="vertical-align:top;background-color:#6699cc;" | USB FDD
! style="vertical-align:top;background-color:#6699cc;" | USB CD
! style="vertical-align:top;background-color:#6699cc;" | FireWire HD
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X41 Tablet | Z60m]]
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:X41 Tablet | Z60t]]
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | N/A
|-
! colspan="9" style="text-align:center;background:#efefef;" |

====Others====
|-
! style="vertical-align:top;background-color:#cfefcf;" | Model
! style="vertical-align:top;background-color:#6699cc;" | FDD
! style="vertical-align:top;background-color:#6699cc;" | CD
! style="vertical-align:top;background-color:#6699cc;" | Network
! style="vertical-align:top;background-color:#6699cc;" | PCMCIA
! style="vertical-align:top;background-color:#6699cc;" | USB HD
! style="vertical-align:top;background-color:#6699cc;" | USB FDD
! style="vertical-align:top;background-color:#6699cc;" | USB CD
! style="vertical-align:top;background-color:#6699cc;" | FireWire HD
|-
| style="vertical-align:top;background-color:#e9f9e9;" |
*[[:Category:TransNote | TransNote]]
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | N/A
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | no
| style="vertical-align:middle;text-align:center;" | ?
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | yes
| style="vertical-align:middle;text-align:center;" | N/A
|}

{{footnotes|
#Choosing USB Boot and booting with a USB flash drive plugged in makes boot procedure extremely long (1m30 just to pass the IBM splash screen). However, it ends up booting the OS in the USB drive (assuming one is indeed present).
#Internal CD/FD means the ones in the UltraBase for X series and 570 models.
#Requires an external Floppy drive attached to Port Replicator or Dock
#Requires that the user select the drive from the disk option shown after clicking F12 on the boot sequence.
#Boots from a flash memory drive, i.e. CompactFlash (with PCMCIA adapter).
}}

Talk:Intel Graphics Media Accelerator 950

2006-04-20T19:06:38Z

Profilek:

Any information about whether this chip supports DRI/hardware-accelerated GLX with free drivers or not?

Cheers :)

you need to install i810 driver from xorg7 version 1.5 or above. glxgears shows something around 600FPS. currently you can get from xorg cvs version 1.6 and get 1000FPS.

cheers