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How to get SpeedStep working on Coppermine-piix4-smi based ThinkPads

2010-07-08T08:44:30Z

Dchallet:

==Foreword==
APPLYING THIS HOWTO MAY MAKE YOU DUMB, CRASH YOUR CPU, YOUR MOTHERBOARD, MAKE YOUR GIRLFRIEND LEAVE YOU, OR MAYBE WORSE, USE IT AT YOUR OWN RISKS, I'M NOTHING OF A KERNEL HACKER, NEITHER A SMART GUY, THIS IS HOW I TRiED TO GET IT WORK, AND TILL NOW IT IS WORKING, MY PROPOSITION ARE ALMOST GUARANTED TO BE DUMB.

This HowTo is intended for people having trouble getting SpeedStep working via CpuFreq on their Coppermine CPU with a piix4 mainboard.
ThinkPads known to have this configuration are the {{X20}}, {{X21}}, {{T20}}, {{T21}}, {{T22}}, {{TransNote}} and possibly {{A20m}}, {{A20p}}, {{A21e}}, {{A21p}}, {{A22e}}, {{A22m}}, {{A22p}} models. (EDIT: A21m reported to be frequency-scaling according to GNOME CPU Freq Applet in Ubuntu Dapper and perhaps already in Hoary)

The issue is that these CPUs do not repport correctly that they are SpeedStep capable.

This Document is under the GNU/GPL v2+ Licence.

==My case==

This is what i get:
I have a x21 IBM ThinkPad, and when trying the SpeedStep implementation of 2.6 kernels i got:
:{{cmduser|sudo modprobe speedstep-smi}}
:{{cmdresult|FATAL: Error inserting speedstep_smi (/lib/modules/2.6.10-rc1-mm4-xa1/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-smi.ko): No such device}}

Rebooting with <tt>cpufreq.debug=7</tt> ( 1 is for core, 2 is for ??, and 4 is for drivers, 7 = 1 + 2 + 4 ) gave:
:{{cmduser|sudo modprobe speedstep-smi}}
:{{cmdresult|FATAL: Error inserting speedstep_smi (/lib/modules/2.6.10-rc1-mm4-xa1/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-smi.ko): No such device}}
:{{cmduser|sudo tail /var/log/syslog}}
:{{cmdresult|[...]}}
:{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: x86: 6, model: 8}}
:{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: Coppermine: MSR_IA32_EBL_CR_POWERON is 0x44080020, 0x0}}
:{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: Coppermine: MSR_IA32_PLATFORM ID is 0x0, 0x540000}}
:{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-smi: No supported Intel CPU detected.}}

==How to get it work==
Note: to get this working on recent kernels you'll need:
CONFIG_X86_SPEEDSTEP_RELAXED_CHECK = y
Disable the speedstep-lib checks
:{{cmduser|1=sudo modprobe speedstep-lib relaxed_check=1}}
:{{cmduser|sudo modprobe speedstep-smi}}

In Debian ( and probably with others, please confirm ), you can automate the module parmeters by creating a {{path|/etc/modprobe.d/speedstep-lib}} file with:
options speedstep-lib relaxed_check=1

And then, you may add these 2 lines to {{path|/etc/modules}}:
speedstep-lib
speedstep-smi

===Ubuntu (Edgy)===
In Ubuntu I had to do following to make it work. Tested with T22.

:{{cmduser|sudo modprobe -r speedstep-lib speedstep-smi }}
:{{cmduser|1=sudo modprobe speedstep-lib relaxed_check=1}}
:{{cmduser|sudo modprobe speedstep-smi }}
:{{cmduser|sudo modprobe cpufreq_userspace }}

With these cpufrequtils works fine.

===Ubuntu (since 9.04)===

Since the above modules are compiled in the kernel, this above methods does not work anymore

:{{cmduser|sudo killall powernowd}}
:{{cmduser|sudo powernowd -q}}

et voilà.

Some people report that one should use grub and not grub2 (see [https://bugs.launchpad.net/ubuntu/+source/linux/+bug/580189/comments/9]).

==How to use it==
[[How to make use of Dynamic Frequency Scaling]]

==What's not working==

On an X20, speedstep_smi messes up acpi and nvram. Best not to use it. See [http://bugzilla.kernel.org/show_bug.cgi?id=6847 Kernel bug 6847]

The speeds shown may be erroneous, which has dramatic consequances if you try to watch movies or applications that are (exact) time-depending (as the timer is all dizzy).

How to get SpeedStep working on Coppermine-piix4-smi based ThinkPads

2010-07-08T08:43:24Z

Dchallet:

==Foreword==
APPLYING THIS HOWTO MAY MAKE YOU DUMB, CRASH YOUR CPU, YOUR MOTHERBOARD, MAKE YOUR GIRLFRIEND LEAVE YOU, OR MAYBE WORSE, USE IT AT YOUR OWN RISKS, I'M NOTHING OF A KERNEL HACKER, NEITHER A SMART GUY, THIS IS HOW I TRiED TO GET IT WORK, AND TILL NOW IT IS WORKING, MY PROPOSITION ARE ALMOST GUARANTED TO BE DUMB.

This HowTo is intended for people having trouble getting SpeedStep working via CpuFreq on their Coppermine CPU with a piix4 mainboard.
ThinkPads known to have this configuration are the {{X20}}, {{X21}}, {{T20}}, {{T21}}, {{T22}}, {{TransNote}} and possibly {{A20m}}, {{A20p}}, {{A21e}}, {{A21p}}, {{A22e}}, {{A22m}}, {{A22p}} models. (EDIT: A21m reported to be frequency-scaling according to GNOME CPU Freq Applet in Ubuntu Dapper and perhaps already in Hoary)

The issue is that these CPUs do not repport correctly that they are SpeedStep capable.

This Document is under the GNU/GPL v2+ Licence.

==My case==

This is what i get:
I have a x21 IBM ThinkPad, and when trying the SpeedStep implementation of 2.6 kernels i got:
:{{cmduser|sudo modprobe speedstep-smi}}
:{{cmdresult|FATAL: Error inserting speedstep_smi (/lib/modules/2.6.10-rc1-mm4-xa1/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-smi.ko): No such device}}

Rebooting with <tt>cpufreq.debug=7</tt> ( 1 is for core, 2 is for ??, and 4 is for drivers, 7 = 1 + 2 + 4 ) gave:
:{{cmduser|sudo modprobe speedstep-smi}}
:{{cmdresult|FATAL: Error inserting speedstep_smi (/lib/modules/2.6.10-rc1-mm4-xa1/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-smi.ko): No such device}}
:{{cmduser|sudo tail /var/log/syslog}}
:{{cmdresult|[...]}}
:{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: x86: 6, model: 8}}
:{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: Coppermine: MSR_IA32_EBL_CR_POWERON is 0x44080020, 0x0}}
:{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: Coppermine: MSR_IA32_PLATFORM ID is 0x0, 0x540000}}
:{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-smi: No supported Intel CPU detected.}}

==How to get it work==
Note: to get this working on recent kernels you'll need:
CONFIG_X86_SPEEDSTEP_RELAXED_CHECK = y
Disable the speedstep-lib checks
:{{cmduser|1=sudo modprobe speedstep-lib relaxed_check=1}}
:{{cmduser|sudo modprobe speedstep-smi}}

In Debian ( and probably with others, please confirm ), you can automate the module parmeters by creating a {{path|/etc/modprobe.d/speedstep-lib}} file with:
options speedstep-lib relaxed_check=1

And then, you may add these 2 lines to {{path|/etc/modules}}:
speedstep-lib
speedstep-smi

===Ubuntu (Edgy)===
In Ubuntu I had to do following to make it work. Tested with T22.

:{{cmduser|sudo modprobe -r speedstep-lib speedstep-smi }}
:{{cmduser|1=sudo modprobe speedstep-lib relaxed_check=1}}
:{{cmduser|sudo modprobe speedstep-smi }}
:{{cmduser|sudo modprobe cpufreq_userspace }}

With these cpufrequtils works fine.

===Ubuntu (since 9.04)===

as root (or with sudo)

:{{cmduser|killall powernowd}}
:{{cmduser|powernowd -q}}

et voilà.

Some people report that one should use grub and not grub2 (see [https://bugs.launchpad.net/ubuntu/+source/linux/+bug/580189/comments/9]).

==How to use it==
[[How to make use of Dynamic Frequency Scaling]]

==What's not working==

On an X20, speedstep_smi messes up acpi and nvram. Best not to use it. See [http://bugzilla.kernel.org/show_bug.cgi?id=6847 Kernel bug 6847]

The speeds shown may be erroneous, which has dramatic consequances if you try to watch movies or applications that are (exact) time-depending (as the timer is all dizzy).

Idle consumptions

2010-07-08T08:38:09Z

Dchallet:

This page reports the minimal consumptions of Thinkpads when idle. This means, in principle: minimum brightness, CPU and GPU at lowest speed, no wifi, hard drive spun down, no pcmcia cards inserted (see details of each entry).

This kind of information has several uses: comparing one's consumption with that of other people's setups, knowing which model to use as a gateway/file server, etc.

{| border="1" cellspacing="0" cellpadding="2"

! Model !! OS !! Remarks !! consumption
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || back light off, laptop-mode-tools enabled, fan on, idling, measured with powertop || 6W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Min brightness, laptop-mode-tools enabled, fan on, idling, measured with powertop || 7.5W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Max brightness, laptop-mode-tools enabled, fan on, idling, measured with powertop || 9.2W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Max brightness, laptop-mode-tools enabled, fan on, 100% cpu utilisation, measured with powertop || ~22W
|----
|{{600E}} PIII/450 || Archlinux/2.6.28 openbox || 1 xterm window, backlight on, fan off || 6.2W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||With Networking, USB, firefox, thunderbird || 11.1W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||Fluxbox + shell (+fan) || 10.5W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||Blank Screen after 20min idle (+fan) || 7.1W
|----
|{{R51e}}|| Gentoo (linux-2.6.24-gentoo-r4) || KDE, min. brightness, tp-fancontrol, ondemand, laptop_mode, madwifi-ng (no powersave), wpa_supplicant, ca 60 wakeups || 14.5W
|----
|{{R52}}|| Gentoo (linux-2.6.22-rc6 + phc + hrt) ||Min brightness, tp-fancontrol, ipw2200 with power_save 5, undervolted, ondemand, laptop_mode, rovclock -c 100 -m 100<br />virtual console (idle kde desktop adds about 0.2W) || 12.1W
|----
|{{R61}}||Ubuntu 7.04||Wireless on||16.4W
|----
|{{R61}}|| Xubuntu 7.10 || custom kernel 2.6.24, Minimal power consumption with Wireless off, hdd spun down, Backlight min, laptop-mode, ondemand, echo 1 > /sys/devices/system/cpu/sched_mc_power_savings, echo 1500 > /proc/sys/vm/dirty_writeback_centisecs, ALPM on, firewire module unloaded, nvidia, hdaps (powertop 1.9)|| 10.8W (min) ~16.5W (usable brightness, wifi on) 39.7W (max, kernel compilation with -j3 option)
|----
|{{T23}}||Ubuntu 7.04|| || 10.7W
|----
|{{T40}}||Gentoo (2.6.23-rc6-hrt2)|| [http://www.linuxpowertop.org/patches/kernel-2.6.22-rc1.patch Bg-timer patch], HPET-patches, radeon, <tt>rovclock -c 105 -m 122</tt>, no DRI, sound power_save = Y, min. brightness, no networking, with USB, Laptop-Mode, X & 1x URxvt || 7,4W
|----
|{{T41p}}||Ubuntu 7.10|| Undervolted, fglrx, no dri; fan->+0.5W, powerstate=2->+0.7W, HD->+1.5W, no usb || 7.7W
|----
|{{T42}} (2373)||Debian 4.0 Etch|| Kernel 2.6.21_rc5 + hrtimer, rovclock -c 100 -m 120 (Radeon M10), no DRI, min bright. (+3W max), no wifi (+1W if idle) || 9.4W
|----
|{{T42}} (2373)||Ubuntu 8.10 Intrepid|| 14" 1024x768 Kernel 2.6.28+tickless+hrtimer, rovclock -c 110 -m 180 (Radeon M7), Xorg + DRI, min bright. (+2.5W max), lan & wifi down, laptop-mode enabled, ultrabay ejected, fan on (auto) || 7.8W
|----
|{{T42}} (2373)||Ubuntu 8.10 Intrepid|| 14" 1024x768 Kernel 2.6.28+tickless+hrtimer, rovclock -c 110 -m 180 (Radeon M7), Xorg + DRI, backlight off, lan & wifi down, laptop-mode enabled, ultrabay ejected, fan on (auto) || 5.6W
|----
|{{T43}} (1871)||Debian (Linux 2.6.21, fluxbox)|| DRI, alsa (power_save=1), with usb, no networking || 10.1W (12.0W with HD)
|----
|{{T43}} (2669)||Gentoo (2.6.20-gentoo-r5)|| Undervolted, fglrx (powerstate=1), DRI, no alsa, no usb modules, no networking || 12.7W
|----
|{{T43}} (2686)||Fedora Core 6 (2.6.19.x patched)|| Undervolted, radeon, <tt>rovclock -c 125 -m 130</tt>, no DRI, ALSA <tt>power_save=1</tt>, no usb modules, no networking, min brightness, HDD spun down || 15W
|----
|{{T60}} (2007)||Fedora Core 6|| Wireless kill switch on, 1400x1050 panel @ min brightness, fglrx (powerstate=1), HDD spun up (~1W saving without) || 16W
|----
|{{T60}} (2007)||Kubuntu 7.04|| 1400x1050 panel @ min brightness, hald killed, laptop mode enabled, wireless powersave|| 13.3 W
|----
|{{T60}} (2007)||KUbuntu 7.04|| Wireless on, 1680x1050 panel @ medium brightness, fglrx (powerstate=1) || 16W
|----
|{{T60}} (2623D6U)||Debian testing (linux-2.6.21-1-686)||1400x1050 14" min-bright, iwpriv wlan0 set_power 7, VESA driver|| 12,7W
|----
|{{T61}} ||Ubuntu 8.04 ||14" 1024x768 panel,intel graphics, 6% bright, wireless off, vanilla kernel 2.6.25|| 9.5W
|----
|{{T61}} ||Gentoo 2008.0 ||14" 1440x900 panel, nVidia, min brightness, wireless off, sound off, nvidia unloaded, laptop_mode, gentoo-sources 2.6.25-gentoo-r6, measured with powertop|| ~13W
|----
|{{T400}} (WC8...)||Ubuntu 9.04 unpatched kernel||*[[Save power with Ubuntu 9.04 (Jaunty Jackalope) on a ThinkPad T400]] || 11-13W
|----
|{{T410}} ||Fedora 13 ||14" 1440x900 panel, intel integrated graphics, 4GB RAM, idle at gnome desktop, measured with powertop|| ~14.5W
|----
|{{X200}}||Mint 8 , KDE||2.6.32, second to minimum brightness, no radios, idle, powertop suggestions followed||7.5W
|----
|{{X200}}||Fedora 12, KDE, Compiz||2.6.31, second to minimum brightness (/proc/acpi/video/VID/LCD0/brightness = 25), no radios, idle, powertop suggestions followed, unused I/O ports disabled in BIOS||7.2W
|----
|{{X200s}}||Gentoo Linux , Fluxbox||2.6.29, HDD stopped, min brightness||6.0W
|----
|{{X200s}}||Gentoo Linux , TWM||2.6.31, SSD, min brightness, powertop improvements, no network||5.6W
|----
|{{X200s}}||Arch Linux||2.6.34.1, Openbox, 1440x900 LED-Panel, Intel-SSD, 4 GB Ram, Fan off, WLAN/BT down, laptop_mode_tools enabled, 1/15 brightness||4.6W
|----
|{{X200s}}||Arch Linux||2.6.27.9, idle kde3, hda_intel power_save 5, HDD stopped, min brightness, radios off, pcie_aspm in powersave, 8bit color depth||6.2W
|----
|{{X200s}}||Arch Linux|| SL9400, 12.1" 1440x900 panel, min. brightness, wifi/bt off || 7.2W
|----
|{{X200s}}||Arch Linux||2.6.27.8, idle kde3 (9 int/s), hda_intel power_save 5, HDD stopped, min brightness, radios off, pcie_aspm in powersave||7.3W
|----
|{{X200s}}||Arch Linux||2.6.27.8, kde3+firefox+daemons, hda_intel power_save 5, HDD spinning up/down, brightness 6/15, wifi on, pcie_aspm in powersave||8.7W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, min. brightness, wifi/bt off, laptop_mode, total idle||7.3W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, half. brightness, wifi/bt off, laptop_mode, simple word-processing (open office) ||~10.5W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, half. brightness, wifi on, laptop_mode, active firefox, amarok playing (via airtunes), pidgin ||~12.5W
|----
|{{X200s}} 7466-3TG||Ubuntu 9.10||2.6.31-15-generic, 12.1" 1280x800 panel, brightness 35, wifi on, pm-utils, active firefox [http://axa-ru.blogspot.com/2009/12/ubuntu-910-thinkpad-x200s-power-saving.html] ||6.3W
|----
|{{X200s}}||OpenSUSE 11.1||2.6.29-66.1 (HEAD from Factory repo), 12.1" 1440x900 led panel, brighness 5 (33%), wifi on, laptop_mode, kde 3.5, active firefox, ||~7.3W
|----
|{{x300}}||Ubuntu 9.04||2.6.28-11-generic 13.3" 1440x900 panel, brightness 50%, wifi on, laptop_mode, active firefox, xmms2 playing, some terminals||~11 W
|----
|{{x300}}||Ubuntu 9.04||2.6.28-11-generic 13.3" 1440x900 panel, brightness 50%, wifi off, laptop_mode, xmms2 playing, some terminals ||~8.8 W
|----
|{{X21}}||Ubuntu 10.04|| Long-term (powertop), backlight on ||5.2W
|----
|{{X31}}||Debian Etch||2.6.22rc6+hrt1 patch+radeon patch||~ 8 W
|----
|{{X31}} (2672-C2G)||Debian Etch||vanilla 2.6.23rc8 tickless kernel, wireless rf-kill on, min brightness, hdd idle but spinning||~ 9.6 W
|----
|{{X32}}||Slackware||2.6.23.1+hrt3 patch, tickless kernel, undervolted to 0.716, ati gfx @ 90mhz core 90mhz mem, hdd is CF, min brightness, wifi ON||~ 8.2 W
|----
|{{X32}}||Slackware||2.6.23.1+hrt3 patch, tickless kernel, undervolted to 0.716, ati gfx @ 90mhz core 90mhz mem, hdd is CF, max brightness, wifi ON||~ 11 W
|----
|{{X40}}||Kubuntu 7.10||2.6.22, min brightness, wifi ON||~8.7W
|----
|{{X40}}||Opensuse 11.0; June08||std. install + laptop-mode-tools.rpm; 2.6.25, min brightness, wifi on. normal X-server, hd spun down||~8.0W
|----
|{{X40}}||Debian Squeeze||2.6.33 custom Kernel, wifi off, min brightness: 3.3 wakeups/s||~6.7W
|----
|{{X41}}||Fedora 7||2.6.23.1+phc patch, tickless kernel, undervolted to 0.7, under X, min brightness, wifi ON||~11W
|----
|{{X60}}||Ubuntu 7.04||Wireless kill switch on, min brightness||10.2W
|----
|{{X60s}}||Debian Etch||2.6.21 tickless kernel, processes tweaked with powertop, usb/fw unloaded, hd spun down, min brightness, ipw3945 set to powersave mode 7||8.3W
|----
|{{X60s}}||Debian Etch||2.6.21 tickless kernel, processes tweaked with powertop, usb/fw unloaded, hd spun down, min brightness,ipw3945 unloaded||9W
|----
|{{X60s}}||Debian Lenny(testing)|| 2.6.22 tickless kernel, hrt-patch, alpm-patches, almost everything unloaded (wifi,pcmcia,ethernet,usb,firewire,sd,snd) and stopped (no X11,only cron/syslog), no vesa-fb, min brightness, 5 min idle, measured with powertop 1.7 (ACPI)||7.7W
|----
|{{X60s}}||Debian Lenny(testing)|| 2.6.22 tickless kernel, hrt-patch, alpm-patches, almost everything unloaded (wifi,pcmcia,ethernet,usb,firewire,sd,snd), with X11 (latest intel-xorg-driver, DRI enabled) and one x-terminal running, min brightness, 5 min idle, measured with powertop 1.7 (ACPI)||8.3W
|----
|{{X61}}||OpenSUSE 11.1|| 2.6.27.7 tickless, KDE 4.2 Beta2, X.Org 7.4 (dri on, fb compression enabled), BT/WiFi OFF, HDD spun down, brightness 0, fan running, default modules loaded, PowerTOP 1.10||10.4W (without X running 10.1W)
|----
|{{X61_Tablet}}||Ubuntu Gutsy(tribe6)|| 2.6.23-rc6-hrt1 x86_64, everything unloaded & stopped, lcd backlight off, hd powered down, powertop 1.8||8.5W
|----
|{{X61_Tablet}}||Xubuntu Gutsy|| 2.6.24-rc3, everything unloaded, lcd backlight 10%, hd powered down, powertop 1.8||7,8W
|----
|{{X61s}} (7666-36G)||Debian Sid|| 2.6.33-rc6, everything unloaded, HD spinned down, xbacklight -set 0, idle Xfce desktop (16 bit colors), [http://tikei.de/sata_poweroff_2.6.33.patch SATA poweroff patch], intel-xorg 2.9.1||7,4W
|----
|{{X301}}||Debian Lenny|| 2.6.29.1, wifi down, lan down, wan down, no WOL, ondemand scaling, brightness 100% || 10,7W (6.3h w/ bay battery)
|----
|{{X301}}||Debian Lenny|| 2.6.29.1, wifi down, lan down, wan down, no WOL, ondemand scaling, brightness 50% || 8,7W
|----
|{{X301}}||Debian Lenny|| 2.6.29.1, wifi down, lan down, wan down, no WOL, ondemand scaling, brightness 0% || 7,8W (8.8h w/ bay battery)
|----

Idle consumptions

2009-04-01T10:17:31Z

Dchallet:

This page reports the minimal consumptions of Thinkpads when idle. This means, in principle: minimum brightness, CPU and GPU at lowest speed, no wifi, hard drive spun down, no pcmcia cards inserted (see details of each entry).

This kind of information has several uses: comparing one's consumption with that of other people's setups, knowing which model to use as a gateway/file server, etc.

{| border="1" cellspacing="0" cellpadding="2"

! Model !! OS !! Remarks !! consumption
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || back light off, laptop-mode-tools enabled, fan on, idling, measured with powertop || 6W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Min brightness, laptop-mode-tools enabled, fan on, idling, measured with powertop || 7.5W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Max brightness, laptop-mode-tools enabled, fan on, idling, measured with powertop || 9.2W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Max brightness, laptop-mode-tools enabled, fan on, 100% cpu utilisation, measured with powertop || ~22W
|----
|{{600E}} PIII/450 || Archlinux/2.6.28 openbox || 1 xterm window, backlight on, fan off || 6.2W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||With Networking, USB, firefox, thunderbird || 11.1W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||Fluxbox + shell (+fan) || 10.5W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||Blank Screen after 20min idle (+fan) || 7.1W
|----
|{{R51e}}|| Gentoo (linux-2.6.24-gentoo-r4) || KDE, min. brightness, tp-fancontrol, ondemand, laptop_mode, madwifi-ng (no powersave), wpa_supplicant, ca 60 wakeups || 14.5W
|----
|{{R52}}|| Gentoo (linux-2.6.22-rc6 + phc + hrt) ||Min brightness, tp-fancontrol, ipw2200 with power_save 5, undervolted, ondemand, laptop_mode, rovclock -c 100 -m 100<br />virtual console (idle kde desktop adds about 0.2W) || 12.1W
|----
|{{R61}}||Ubuntu 7.04||Wireless on||16.4W
|----
|{{R61}}|| Xubuntu 7.10 || custom kernel 2.6.24, Minimal power consumption with Wireless off, hdd spun down, Backlight min, laptop-mode, ondemand, echo 1 > /sys/devices/system/cpu/sched_mc_power_savings, echo 1500 > /proc/sys/vm/dirty_writeback_centisecs, ALPM on, firewire module unloaded, nvidia, hdaps (powertop 1.9)|| 10.8W (min) ~16.5W (usable brightness, wifi on) 39.7W (max, kernel compilation with -j3 option)
|----
|{{T23}}||Ubuntu 7.04|| || 10.7W
|----
|{{T40}}||Gentoo (2.6.23-rc6-hrt2)|| [http://www.linuxpowertop.org/patches/kernel-2.6.22-rc1.patch Bg-timer patch], HPET-patches, radeon, <tt>rovclock -c 105 -m 122</tt>, no DRI, sound power_save = Y, min. brightness, no networking, with USB, Laptop-Mode, X & 1x URxvt || 7,4W
|----
|{{T41p}}||Ubuntu 7.10|| Undervolted, fglrx, no dri; fan->+0.5W, powerstate=2->+0.7W, HD->+1.5W, no usb || 7.7W
|----
|{{T42}} (2373)||Debian 4.0 Etch|| Kernel 2.6.21_rc5 + hrtimer, rovclock -c 100 -m 120 (Radeon M10), no DRI, min bright. (+3W max), no wifi (+1W if idle) || 9.4W
|----
|{{T42}} (2373)||Ubuntu 8.10 Intrepid|| 14" 1024x768 Kernel 2.6.28+tickless+hrtimer, rovclock -c 110 -m 180 (Radeon M7), Xorg + DRI, min bright. (+2.5W max), lan & wifi down, laptop-mode enabled, ultrabay ejected, fan on (auto) || 7.8W
|----
|{{T42}} (2373)||Ubuntu 8.10 Intrepid|| 14" 1024x768 Kernel 2.6.28+tickless+hrtimer, rovclock -c 110 -m 180 (Radeon M7), Xorg + DRI, backlight off, lan & wifi down, laptop-mode enabled, ultrabay ejected, fan on (auto) || 5.6W
|----
|{{T43}} (1871)||Debian (Linux 2.6.21, fluxbox)|| DRI, alsa (power_save=1), with usb, no networking || 10.1W (12.0W with HD)
|----
|{{T43}} (2669)||Gentoo (2.6.20-gentoo-r5)|| Undervolted, fglrx (powerstate=1), DRI, no alsa, no usb modules, no networking || 12.7W
|----
|{{T43}} (2686)||Fedora Core 6 (2.6.19.x patched)|| Undervolted, radeon, <tt>rovclock -c 125 -m 130</tt>, no DRI, ALSA <tt>power_save=1</tt>, no usb modules, no networking, min brightness, HDD spun down || 15W
|----
|{{T60}} (2007)||Fedora Core 6|| Wireless kill switch on, 1400x1050 panel @ min brightness, fglrx (powerstate=1), HDD spun up (~1W saving without) || 16W
|----
|{{T60}} (2007)||Kubuntu 7.04|| 1400x1050 panel @ min brightness, hald killed, laptop mode enabled, wireless powersave|| 13.3 W
|----
|{{T60}} (2007)||KUbuntu 7.04|| Wireless on, 1680x1050 panel @ medium brightness, fglrx (powerstate=1) || 16W
|----
|{{T60}} (2623D6U)||Debian testing (linux-2.6.21-1-686)||1400x1050 14" min-bright, iwpriv wlan0 set_power 7, VESA driver|| 12,7W
|----
|{{T61}} ||Ubuntu 8.04 ||14" 1024x768 panel,intel graphics, 6% bright, wireless off, vanilla kernel 2.6.25|| 9.5W
|----
|{{T61}} ||Gentoo 2008.0 ||14" 1440x900 panel, nVidia, min brightness, wireless off, sound off, nvidia unloaded, laptop_mode, gentoo-sources 2.6.25-gentoo-r6, measured with powertop|| ~13W
|----
|{{X200s}}||Arch Linux||2.6.27.9, idle kde3, hda_intel power_save 5, HDD stopped, min brightness, radios off, pcie_aspm in powersave, 8bit color depth||6.2W
|----
|{{X200s}}||Arch Linux|| SL9400, 12.1" 1440x900 panel, min. brightness, wifi/bt off || 7.2W
|----
|{{X200s}}||Arch Linux||2.6.27.8, idle kde3 (9 int/s), hda_intel power_save 5, HDD stopped, min brightness, radios off, pcie_aspm in powersave||7.3W
|----
|{{X200s}}||Arch Linux||2.6.27.8, kde3+firefox+daemons, hda_intel power_save 5, HDD spinning up/down, brightness 6/15, wifi on, pcie_aspm in powersave||8.7W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, min. brightness, wifi/bt off, laptop_mode, total idle||7.3W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, half. brightness, wifi/bt off, laptop_mode, simple word-processing (open office) ||~10.5W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, half. brightness, wifi on, laptop_mode, active firefox, amarok playing (via airtunes), pidgin ||~12.5W
|----
|{{X21}}||Kubuntu 7.04|| Minimal consumption with kde loaded.||5.5W
|----
|{{X31}}||Debian Etch||2.6.22rc6+hrt1 patch+radeon patch||~ 8 W
|----
|{{X31}} (2672-C2G)||Debian Etch||vanilla 2.6.23rc8 tickless kernel, wireless rf-kill on, min brightness, hdd idle but spinning||~ 9.6 W
|----
|{{X32}}||Slackware||2.6.23.1+hrt3 patch, tickless kernel, undervolted to 0.716, ati gfx @ 90mhz core 90mhz mem, hdd is CF, min brightness, wifi ON||~ 8.2 W
|----
|{{X32}}||Slackware||2.6.23.1+hrt3 patch, tickless kernel, undervolted to 0.716, ati gfx @ 90mhz core 90mhz mem, hdd is CF, max brightness, wifi ON||~ 11 W
|----
|{{X40}}||Kubuntu 7.10||2.6.22, min brightness, wifi ON||~8.7W
|----
|{{X40}}||Opensuse 11.0; June08||std. install + laptop-mode-tools.rpm; 2.6.25, min brightness, wifi on. normal X-server, hd spun down||~8.0W
|----
|{{X41}}||Fedora 7||2.6.23.1+phc patch, tickless kernel, undervolted to 0.7, under X, min brightness, wifi ON||~11W
|----
|{{X60}}||Ubuntu 7.04||Wireless kill switch on, min brightness||10.2W
|----
|{{X60s}}||Debian Etch||2.6.21 tickless kernel, processes tweaked with powertop, usb/fw unloaded, hd spun down, min brightness, ipw3945 set to powersave mode 7||8.3W
|----
|{{X60s}}||Debian Etch||2.6.21 tickless kernel, processes tweaked with powertop, usb/fw unloaded, hd spun down, min brightness,ipw3945 unloaded||9W
|----
|{{X60s}}||Debian Lenny(testing)|| 2.6.22 tickless kernel, hrt-patch, alpm-patches, almost everything unloaded (wifi,pcmcia,ethernet,usb,firewire,sd,snd) and stopped (no X11,only cron/syslog), no vesa-fb, min brightness, 5 min idle, measured with powertop 1.7 (ACPI)||7.7W
|----
|{{X60s}}||Debian Lenny(testing)|| 2.6.22 tickless kernel, hrt-patch, alpm-patches, almost everything unloaded (wifi,pcmcia,ethernet,usb,firewire,sd,snd), with X11 (latest intel-xorg-driver, DRI enabled) and one x-terminal running, min brightness, 5 min idle, measured with powertop 1.7 (ACPI)||8.3W
|----
|{{X61}}||OpenSUSE 11.1|| 2.6.27.7 tickless, KDE 4.2 Beta2, X.Org 7.4 (dri on, fb compression enabled), BT/WiFi OFF, HDD spun down, brightness 0, fan running, default modules loaded, PowerTOP 1.10||10.4W (without X running 10.1W)
|----
|{{X61_Tablet}}||Ubuntu Gutsy(tribe6)|| 2.6.23-rc6-hrt1 x86_64, everything unloaded & stopped, lcd backlight off, hd powered down, powertop 1.8||8.5W
|----
|{{X61_Tablet}}||Xubuntu Gutsy|| 2.6.24-rc3, everything unloaded, lcd backlight 10%, hd powered down, powertop 1.8||7,8W
|----
|{{X61s}} (7666-36G)||Debian Sid|| 2.6.27.7, everything unloaded, HD spinned down, xbacklight -set 0, idle Xfce desktop, [http://tikei.de/sata-phy-poweroff_2.6.27.patch SATA poweroff patch], Xorg intel driver with framebuffer compression enabled||8,4W

Idle consumptions

2009-04-01T10:16:39Z

Dchallet:

This page reports the minimal consumptions of Thinkpads when idle. This means, in principle: minimum brightness, CPU and GPU at lowest speed, no wifi, hard drive spun down, no pcmcia cards inserted (see details of each entry).

This kind of information has several uses: comparing one's consumption with that of other people's setups, knowing which model to use as a gateway/file server, etc.

{| border="1" cellspacing="0" cellpadding="2"

! Model !! OS !! Remarks !! consumption
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || back light off, laptop-mode-tools enabled, fan on, idling, measured with powertop || 6W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Min brightness, laptop-mode-tools enabled, fan on, idling, measured with powertop || 7.5W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Max brightness, laptop-mode-tools enabled, fan on, idling, measured with powertop || 9.2W
|----
|{{600E}} PII/366 || Debian Lenny/2.6.21 gnome || Max brightness, laptop-mode-tools enabled, fan on, 100% cpu utilisation, measured with powertop || ~22W
|----
|{{600E}} PIII/450 || Archlinux/2.6.28 openbox, 1 xterm window, backlight on, fan off || || 6.2W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||With Networking, USB, firefox, thunderbird || 11.1W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||Fluxbox + shell (+fan) || 10.5W
|----
|{{R50e}}|| Gentoo (linux-2.6.22-rc4 force_HPET, fluxbox) ||Blank Screen after 20min idle (+fan) || 7.1W
|----
|{{R51e}}|| Gentoo (linux-2.6.24-gentoo-r4) || KDE, min. brightness, tp-fancontrol, ondemand, laptop_mode, madwifi-ng (no powersave), wpa_supplicant, ca 60 wakeups || 14.5W
|----
|{{R52}}|| Gentoo (linux-2.6.22-rc6 + phc + hrt) ||Min brightness, tp-fancontrol, ipw2200 with power_save 5, undervolted, ondemand, laptop_mode, rovclock -c 100 -m 100<br />virtual console (idle kde desktop adds about 0.2W) || 12.1W
|----
|{{R61}}||Ubuntu 7.04||Wireless on||16.4W
|----
|{{R61}}|| Xubuntu 7.10 || custom kernel 2.6.24, Minimal power consumption with Wireless off, hdd spun down, Backlight min, laptop-mode, ondemand, echo 1 > /sys/devices/system/cpu/sched_mc_power_savings, echo 1500 > /proc/sys/vm/dirty_writeback_centisecs, ALPM on, firewire module unloaded, nvidia, hdaps (powertop 1.9)|| 10.8W (min) ~16.5W (usable brightness, wifi on) 39.7W (max, kernel compilation with -j3 option)
|----
|{{T23}}||Ubuntu 7.04|| || 10.7W
|----
|{{T40}}||Gentoo (2.6.23-rc6-hrt2)|| [http://www.linuxpowertop.org/patches/kernel-2.6.22-rc1.patch Bg-timer patch], HPET-patches, radeon, <tt>rovclock -c 105 -m 122</tt>, no DRI, sound power_save = Y, min. brightness, no networking, with USB, Laptop-Mode, X & 1x URxvt || 7,4W
|----
|{{T41p}}||Ubuntu 7.10|| Undervolted, fglrx, no dri; fan->+0.5W, powerstate=2->+0.7W, HD->+1.5W, no usb || 7.7W
|----
|{{T42}} (2373)||Debian 4.0 Etch|| Kernel 2.6.21_rc5 + hrtimer, rovclock -c 100 -m 120 (Radeon M10), no DRI, min bright. (+3W max), no wifi (+1W if idle) || 9.4W
|----
|{{T42}} (2373)||Ubuntu 8.10 Intrepid|| 14" 1024x768 Kernel 2.6.28+tickless+hrtimer, rovclock -c 110 -m 180 (Radeon M7), Xorg + DRI, min bright. (+2.5W max), lan & wifi down, laptop-mode enabled, ultrabay ejected, fan on (auto) || 7.8W
|----
|{{T42}} (2373)||Ubuntu 8.10 Intrepid|| 14" 1024x768 Kernel 2.6.28+tickless+hrtimer, rovclock -c 110 -m 180 (Radeon M7), Xorg + DRI, backlight off, lan & wifi down, laptop-mode enabled, ultrabay ejected, fan on (auto) || 5.6W
|----
|{{T43}} (1871)||Debian (Linux 2.6.21, fluxbox)|| DRI, alsa (power_save=1), with usb, no networking || 10.1W (12.0W with HD)
|----
|{{T43}} (2669)||Gentoo (2.6.20-gentoo-r5)|| Undervolted, fglrx (powerstate=1), DRI, no alsa, no usb modules, no networking || 12.7W
|----
|{{T43}} (2686)||Fedora Core 6 (2.6.19.x patched)|| Undervolted, radeon, <tt>rovclock -c 125 -m 130</tt>, no DRI, ALSA <tt>power_save=1</tt>, no usb modules, no networking, min brightness, HDD spun down || 15W
|----
|{{T60}} (2007)||Fedora Core 6|| Wireless kill switch on, 1400x1050 panel @ min brightness, fglrx (powerstate=1), HDD spun up (~1W saving without) || 16W
|----
|{{T60}} (2007)||Kubuntu 7.04|| 1400x1050 panel @ min brightness, hald killed, laptop mode enabled, wireless powersave|| 13.3 W
|----
|{{T60}} (2007)||KUbuntu 7.04|| Wireless on, 1680x1050 panel @ medium brightness, fglrx (powerstate=1) || 16W
|----
|{{T60}} (2623D6U)||Debian testing (linux-2.6.21-1-686)||1400x1050 14" min-bright, iwpriv wlan0 set_power 7, VESA driver|| 12,7W
|----
|{{T61}} ||Ubuntu 8.04 ||14" 1024x768 panel,intel graphics, 6% bright, wireless off, vanilla kernel 2.6.25|| 9.5W
|----
|{{T61}} ||Gentoo 2008.0 ||14" 1440x900 panel, nVidia, min brightness, wireless off, sound off, nvidia unloaded, laptop_mode, gentoo-sources 2.6.25-gentoo-r6, measured with powertop|| ~13W
|----
|{{X200s}}||Arch Linux||2.6.27.9, idle kde3, hda_intel power_save 5, HDD stopped, min brightness, radios off, pcie_aspm in powersave, 8bit color depth||6.2W
|----
|{{X200s}}||Arch Linux|| SL9400, 12.1" 1440x900 panel, min. brightness, wifi/bt off || 7.2W
|----
|{{X200s}}||Arch Linux||2.6.27.8, idle kde3 (9 int/s), hda_intel power_save 5, HDD stopped, min brightness, radios off, pcie_aspm in powersave||7.3W
|----
|{{X200s}}||Arch Linux||2.6.27.8, kde3+firefox+daemons, hda_intel power_save 5, HDD spinning up/down, brightness 6/15, wifi on, pcie_aspm in powersave||8.7W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, min. brightness, wifi/bt off, laptop_mode, total idle||7.3W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, half. brightness, wifi/bt off, laptop_mode, simple word-processing (open office) ||~10.5W
|----
|{{X200s}}||Ubuntu 8.10||2.6.27.9, 12.1" 1280x800 panel, half. brightness, wifi on, laptop_mode, active firefox, amarok playing (via airtunes), pidgin ||~12.5W
|----
|{{X21}}||Kubuntu 7.04|| Minimal consumption with kde loaded.||5.5W
|----
|{{X31}}||Debian Etch||2.6.22rc6+hrt1 patch+radeon patch||~ 8 W
|----
|{{X31}} (2672-C2G)||Debian Etch||vanilla 2.6.23rc8 tickless kernel, wireless rf-kill on, min brightness, hdd idle but spinning||~ 9.6 W
|----
|{{X32}}||Slackware||2.6.23.1+hrt3 patch, tickless kernel, undervolted to 0.716, ati gfx @ 90mhz core 90mhz mem, hdd is CF, min brightness, wifi ON||~ 8.2 W
|----
|{{X32}}||Slackware||2.6.23.1+hrt3 patch, tickless kernel, undervolted to 0.716, ati gfx @ 90mhz core 90mhz mem, hdd is CF, max brightness, wifi ON||~ 11 W
|----
|{{X40}}||Kubuntu 7.10||2.6.22, min brightness, wifi ON||~8.7W
|----
|{{X40}}||Opensuse 11.0; June08||std. install + laptop-mode-tools.rpm; 2.6.25, min brightness, wifi on. normal X-server, hd spun down||~8.0W
|----
|{{X41}}||Fedora 7||2.6.23.1+phc patch, tickless kernel, undervolted to 0.7, under X, min brightness, wifi ON||~11W
|----
|{{X60}}||Ubuntu 7.04||Wireless kill switch on, min brightness||10.2W
|----
|{{X60s}}||Debian Etch||2.6.21 tickless kernel, processes tweaked with powertop, usb/fw unloaded, hd spun down, min brightness, ipw3945 set to powersave mode 7||8.3W
|----
|{{X60s}}||Debian Etch||2.6.21 tickless kernel, processes tweaked with powertop, usb/fw unloaded, hd spun down, min brightness,ipw3945 unloaded||9W
|----
|{{X60s}}||Debian Lenny(testing)|| 2.6.22 tickless kernel, hrt-patch, alpm-patches, almost everything unloaded (wifi,pcmcia,ethernet,usb,firewire,sd,snd) and stopped (no X11,only cron/syslog), no vesa-fb, min brightness, 5 min idle, measured with powertop 1.7 (ACPI)||7.7W
|----
|{{X60s}}||Debian Lenny(testing)|| 2.6.22 tickless kernel, hrt-patch, alpm-patches, almost everything unloaded (wifi,pcmcia,ethernet,usb,firewire,sd,snd), with X11 (latest intel-xorg-driver, DRI enabled) and one x-terminal running, min brightness, 5 min idle, measured with powertop 1.7 (ACPI)||8.3W
|----
|{{X61}}||OpenSUSE 11.1|| 2.6.27.7 tickless, KDE 4.2 Beta2, X.Org 7.4 (dri on, fb compression enabled), BT/WiFi OFF, HDD spun down, brightness 0, fan running, default modules loaded, PowerTOP 1.10||10.4W (without X running 10.1W)
|----
|{{X61_Tablet}}||Ubuntu Gutsy(tribe6)|| 2.6.23-rc6-hrt1 x86_64, everything unloaded & stopped, lcd backlight off, hd powered down, powertop 1.8||8.5W
|----
|{{X61_Tablet}}||Xubuntu Gutsy|| 2.6.24-rc3, everything unloaded, lcd backlight 10%, hd powered down, powertop 1.8||7,8W
|----
|{{X61s}} (7666-36G)||Debian Sid|| 2.6.27.7, everything unloaded, HD spinned down, xbacklight -set 0, idle Xfce desktop, [http://tikei.de/sata-phy-poweroff_2.6.27.patch SATA poweroff patch], Xorg intel driver with framebuffer compression enabled||8,4W

Idle consumptions

2007-10-23T09:21:20Z

Dchallet:

Idle consumptions

2007-09-25T09:09:29Z

Dchallet:

Idle consumptions

2007-09-19T10:31:02Z

Dchallet:

Idle consumptions

2007-09-19T10:30:27Z

Dchallet:

Idle consumptions

2007-09-18T21:27:14Z

Dchallet:

Idle consumptions

2007-06-29T11:27:24Z

Dchallet:

Idle consumptions

2007-06-29T11:23:33Z

Dchallet:

Idle consumptions

2007-04-29T06:47:33Z

Dchallet:

Talk:Idle consumptions

2007-04-29T06:44:20Z

Dchallet:

How did you measure? - I just checked the value after 2 minutes in idle.
Any better ideas? Maybe a script with min/avg/max values over a time period?

[[User:Defiant|Defiant]] 13:02, 28 April 2007 (CEST)
--

I observed the power_now "counter" provided by tp_smapi over a short period of time (30 seconds, maybe?)

I do it with cat /proc/acpi/battery/BAT[whatever it is]/state

Idle consumptions

2007-04-28T15:01:45Z

Dchallet:

Idle consumptions

2007-04-28T12:02:53Z

Dchallet:

Idle consumptions

2007-04-28T11:56:48Z

Dchallet:

Idle consumptions

2007-04-28T08:09:27Z

Dchallet:

Idle consumptions

2007-04-28T08:06:35Z

Dchallet:

CPU upgrade

2006-04-07T10:59:53Z

Dchallet: /* Upgrading your Pentium II to a Pentium III */

== Upgrading your Pentium II to a Pentium III ==

Thinkpads dating from around 1999-2000 have MMC2 CPU daughter boards, hence, can be upgraded.

The hardware maintenance manual explains in details how to proceed. The only catch is that the BIOS cannot activate the L2 cache of a Pentium III, which is solved by using a [http://www.maths.ox.ac.uk/~challet/module/module.html kernel module].

The good news is that the memory bus speed goes from 66MHz to 100MHz.

The other bad news is that the bios produces errors of type 127 when booting (press ESC, then F1). Fortunately, modifying one byte in the bios with the integrated bios editor cures definitely the problem (see [http://www.wimsbios.com/phpBB2/viewtopic.php?t=4046 this post])

Be carefull when choosing the speed of the new MMC2 daughter board, since there might be some problems with voltages/speedstep. 500MHz is a safe choice. Processors with SpeedStep seem to work as well although they stay at their lowest speed unless one uses modifies physically the daughter board (see the post above).

CPU upgrade

2006-04-07T10:51:02Z

Dchallet:

Hardware Modifications

2006-04-07T10:42:46Z

Dchallet: /* Hardware hacks */

This page is dedicated to your Hardware modifications and stories about strange or clever uses of ThinkPads.

==Hardware hacks==
* [[Harddrive Upgrade|Upgrade your hard drive]]
* [[CPU upgrade]]
* [[How to build your own UltraBay drive]]
* [[How to build your own UltraBay Plus device]]
* [[How to build your own UltraPort device]]
* [[Unofficial maximum memory specs]]

==Undocumented software control of hardware==
*[[Pentium M undervolting and underclocking]]
*[[How to control fan speed]]

==External Sources==
*[http://www.stud.uni-hannover.de/~przemy/en_ibm760xd.html ThinkPad 760XD do-it-yourself-page]
*[http://repair4laptop.org/disassembly_ibm.html How to Upgrade, Repair, Disassemble a Lenovo (former IBM) ThinkPad Laptop or Notebook] - links to illustrated (often) HOWTOs for old and new ThinkPad models.
*[http://members.at.infoseek.co.jp/monkung/tp_cup/tp_cup.htm ThinkPad overclocking by photo for different older models (japanese)]
*[http://www.ibmmania.com/submenu3-tp.htm IBM Mania's Application pages] <tt>(Korean, but with pictures)</tt>
*[http://forum.thinkpads.com/viewtopic.php?t=20958 T43p Embedded Controller Internals]