ThinkWiki - User contributions [en]

CS4624

2009-04-10T12:02:36Z

Gandro:

__NOTOC__
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<div style="margin: 0; margin-right:10px; border: 1px solid #dfdfdf; padding: 0em 1em 1em 1em; background-color:#F8F8FF; align:right;">
=== CS4624 ===
This is a Cirrus Logic Audio controller

Note: This chip is paired with a [[CS4297|CS4297A]] AC'97 Audio controller, only one sound driver should be loaded.

=== Features ===
* Chipset: CS4624
* Interface: PCI
* PCI ID: 1013:6003
</div>
|style="vertical-align:top" |
|}

=== Linux ALSA driver ===
This sound chip is supported by the snd-cs46xx kernel module.

==== Problems with suspend and resume in kernel prior 2.6.29 ====
The driver has a bug in that sound does not work after suspend and resume. If the cs46xx Alsa driver is compiled as a module though, sound can be reinitialized by removing and reloading the module and resetting the alsamixer soundlevels. A simple bash-script (to be run as root) that does this, would look roughly like this:

<pre>#!/bin/sh
/etc/rc.d/init.d/alsa stop
modprobe -r cs46xx
modprobe cs46xx
/etc/rc.d/init.d/alsa start</pre>

Do note that the link to "/etc/rc.d/init.d/alsa" may have to be modified depending on where your distributions init-files are placed.

Without the kernel config option {{kernelconf|CONFIG_SND_CS46XX_NEW_DSP|[ ]|Currus Logic (Sound Fusion) New DSP support||||}} suspend and resume works perfectly. However, the old DPS image has no support for multichannel sound or dmix, so you have to use a soundserver like <tt>esd</tt> or PulseAudio to allow multiple applications to play sounds at the same time.

==== Problems with the microphone ====
If you can't seem to use your mic with this card, open up alsamixer and set the following 3 channels to "capture": MIC, CAPTURE, ADC. Make sure your amixer output contains following:
Simple mixer control 'ADC',0
Capabilities: volume cswitch cswitch-joined
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 32767
Front Left: 32767 [100%] Capture [on]
Front Right: 32767 [100%] Capture [on]
(see also: http://alsa.opensrc.org/cs46xx)

=== ThinkPads this chip may be found in ===
* {{600X}}
* {{A20m}}, {{A20p}}, {{A21m}}, {{A21p}}, {{A22m}}, {{A22p}}
* {{T20}}, {{T21}}, {{T22}}

[[Category:Components]]

LCD Brightness

2008-12-19T13:57:01Z

Gandro:

{{Stub}}

== Regular ACPI ==

This worked for my {{X61}}:

Once your brightness keys work, you can set the brightness by writing to the procfs:

{{cmdroot|echo 100 > /proc/acpi/video/VID1/LCD0/brightness}}

using a script and acpid events. However this may lead to a bug (screen flickers) described on the Debian mailing list [[http://www.mail-archive.com/debian-x@lists.debian.org/msg71942.html]]. This bug is related to the X server as it does not occur on the tty1. To fix it change your xrandr backlight control to native:

{{cmduser|$xrandr --output LVDS --set BACKLIGHT_CONTROL native}}

For my {{X61}}, these following scripts from [http://d.hatena.ne.jp/conceal-rs/20080309/1205083315 this japanese site] helped:

% cat /etc/acpi/video_brightnessdown.sh
#!/bin/sh
xbacklight -dec 10%

% cat /etc/acpi/video_brightnessup.sh
#!/bin/sh
xbacklight -inc 10%
=== 2.6.26 kernel ===

If you are using a 2.6.26 kernel, you are supposed to use the regular ACPI backlight control instead of thinkpad-acpi, on any Lenovo (Windows Vista-capable) ThinkPad.

Modify the kernel config by first disabling CONFIG_THINKPAD_ACPI_VIDEO and then enabling both CONFIG_VIDEO_OUTPUT_CONTROL and CONFIG_ACPI_VIDEO [http://www.nabble.com/T61-Brightness-keys-with-2.6.26-not-working-(NVIDIA)-td18577619.html] While you are at it, be sure to read the well-written help sections for the kernel config settings :)

== Thinkpad-ACPI ==

If you have an older ThinkPad model, such as the {{T20}}, you may want to use [[thinkpad-acpi]].
You can adjust the brightness of your screen by software using either procfs or sysfs.

If the following commands fail, you may want to try other module parameters for thinkpad-acpi. I had to use <tt>backlight_mode=1</tt> for example on my {{T20}}.
Just add the following line to your {{path|/etc/modprobe.conf}}
options thinkpad-acpi brightness_mode=1

See the chapter <tt>LCD brightness control</tt> of {{path|Documentation/laptops/thinkpad-acpi.txt}} in the kernel sources for more informations.

==== Using procfs ====

To adjust the brightness to a certain level:

{{cmdroot|echo 'level 3' > /proc/acpi/ibm/brightness}}

Just one level up or down:

{{cmdroot|echo 'up' > /proc/acpi/ibm/brightness}} <br />
{{cmdroot|echo 'down' > /proc/acpi/ibm/brightness}}

See {{path|/proc/acpi/ibm/brightness}} for a list of all available commands.

==== Using sysfs ====

The sysfs-interface allows more a flexible method of brightness control:

Get the current brightness level:

{{cmdroot|cat /sys/class/backlight/thinkpad_screen/actual_brightness}}

Get the highest brightness level:

{{cmdroot|cat /sys/class/backlight/thinkpad_screen/max_brightness}}

Adjust the brightness to a certain level:

{{cmdroot|echo 3 > /sys/class/backlight/thinkpad_screen/brightness}}

== Ubuntu 8.10 Intrepid Ibex ==
The hardware keys work out of the box on a clean install of Ubuntu 8.10 Intrepid Ibex. No tweaking necessary.

CS4624

2008-12-10T15:52:54Z

Gandro: /* Linux ALSA driver */

__NOTOC__
{| width="100%"
|style="vertical-align:top" |
<div style="margin: 0; margin-right:10px; border: 1px solid #dfdfdf; padding: 0em 1em 1em 1em; background-color:#F8F8FF; align:right;">
=== CS4624 ===
This is a Cirrus Logic Audio controller

Note: This chip is paired with a [[CS4297|CS4297A]] AC'97 Audio controller, only one sound driver should be loaded.

=== Features ===
* Chipset: CS4624
* Interface: PCI
* PCI ID: 1013:6003
</div>
|style="vertical-align:top" |
|}

=== Linux OSS driver ===
This sound chip is supported by the cs46xx kernel module.

=== Linux ALSA driver ===
This sound chip is supported by the snd-cs46xx kernel module. The driver has a bug in that sound does not work after suspend and resume. If the cs46xx Alsa driver is compiled as a module though, sound can be reinitialized by removing and reloading the module and resetting the alsamixer soundlevels. A simple bash-script (to be run as root) that does this, would look roughly like this:

<pre>#!/bin/sh
/etc/rc.d/init.d/alsa stop
modprobe -r cs46xx
modprobe cs46xx
/etc/rc.d/init.d/alsa start</pre>

Do note that the link to "/etc/rc.d/init.d/alsa" may have to be modified depending on where your distributions init-files are placed.

Without the kernel config option {{kernelconf|CONFIG_SND_CS46XX_NEW_DSP|[ ]|Currus Logic (Sound Fusion) New DSP support||||}} suspend and resume works perfectly. However, the old DPS image has no support for multichannel sound or dmix, so you have to use a soundserver like <tt>esd</tt> or PulseAudio to allow multiple applications to play sounds at the same time.

If you can't seem to use your mic with this card, open up alsamixer and set the following 3 channels to "capture": MIC, CAPTURE, ADC. Make sure your amixer output contains following:
Simple mixer control 'ADC',0
Capabilities: volume cswitch cswitch-joined
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 32767
Front Left: 32767 [100%] Capture [on]
Front Right: 32767 [100%] Capture [on]
(see also: http://alsa.opensrc.org/cs46xx)

=== ThinkPads this chip may be found in ===
* {{600X}}
* {{A20m}}, {{A20p}}, {{A21m}}, {{A21p}}, {{A22m}}, {{A22p}}
* {{T20}}, {{T21}}, {{T22}}

[[Category:Components]]

CS4624

2008-12-10T15:51:54Z

Gandro: /* Linux ALSA driver */

__NOTOC__
{| width="100%"
|style="vertical-align:top" |
<div style="margin: 0; margin-right:10px; border: 1px solid #dfdfdf; padding: 0em 1em 1em 1em; background-color:#F8F8FF; align:right;">
=== CS4624 ===
This is a Cirrus Logic Audio controller

Note: This chip is paired with a [[CS4297|CS4297A]] AC'97 Audio controller, only one sound driver should be loaded.

=== Features ===
* Chipset: CS4624
* Interface: PCI
* PCI ID: 1013:6003
</div>
|style="vertical-align:top" |
|}

=== Linux OSS driver ===
This sound chip is supported by the cs46xx kernel module.

=== Linux ALSA driver ===
This sound chip is supported by the snd-cs46xx kernel module. The driver has a bug in that sound does not work after suspend and resume. If the cs46xx Alsa driver is compiled as a module though, sound can be reinitialized by removing and reloading the module and resetting the alsamixer soundlevels. A simple bash-script (to be run as root) that does this, would look roughly like this:

<pre>#!/bin/sh
/etc/rc.d/init.d/alsa stop
modprobe -r cs46xx
modprobe cs46xx
/etc/rc.d/init.d/alsa start</pre>

Do note that the link to "/etc/rc.d/init.d/alsa" may have to be modified depending on where your distributions init-files are placed.

Without the kernel config option {{kernelconf|CONFIG_SND_CS46XX_NEW_DSP|[ ]|Currus Logic (Sound Fusion) New DSP support||||}} suspend and resume works perfectly. However, the old DPS image has no support for multichannel sound or dmix, so you have to use a soundserver like <tt>esd</tt> or PulseAudio to allow multiple applications to play sounds at the same time

If you can't seem to use your mic with this card, open up alsamixer and set the following 3 channels to "capture": MIC, CAPTURE, ADC. Make sure your amixer output contains following:
Simple mixer control 'ADC',0
Capabilities: volume cswitch cswitch-joined
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 32767
Front Left: 32767 [100%] Capture [on]
Front Right: 32767 [100%] Capture [on]
(see also: http://alsa.opensrc.org/cs46xx)

=== ThinkPads this chip may be found in ===
* {{600X}}
* {{A20m}}, {{A20p}}, {{A21m}}, {{A21p}}, {{A22m}}, {{A22p}}
* {{T20}}, {{T21}}, {{T22}}

[[Category:Components]]

How to configure cpudynd

2008-12-10T15:30:59Z

Gandro:

{{NOTE|See the [[How_to_make_use_of_Dynamic_Frequency_Scaling|Dynamic Frequency Scaling HOWTO]] on how to avoid using cpu frequency scaling daemons by using the kernel builtin ondemand governor.}}

If you decide not to use the ACPI throttling functionality (as you certainly will on simple SpeedStep models like all T2x), cpudynd will work by changing the kernels frequency scaling governors: it will load the powersave governor by default and exchange it against the performance governor if the CPU load exceeds a certain level. Therefore, you have to make sure that those two governors can be used by the kernel, i.e. their modules (<tt>cpufreq_performance</tt> and <tt>cpufreq_powersave</tt>) are loaded properly.

{{NOTE|There is a "bug" in cpudynd 1.0.1: The interval which is passed with the <tt>-i</tt> parameter is handled as deciseconds instead of seconds, which causes unnecessary wakeups of the cpu. Use the <tt>-ms</tt> parameter with the value in milliseconds as a workarouond for this. }}

In {{Debian}}, all you have to do is:
:{{cmdroot|apt-get install cpudyn}}
In most cases it will work out of the box.

This is the default Debian config, but works well out of the box:

# Cpudyn configure options

################################################
# COMMON OPTIONS
################################################
#
# Internal between idle ratio tests in 1/10 sec increments
#
INTERVAL=1

################################################
# CPUFREQ OPTIONS
################################################
#
# CPU idle work ratio to speed up
#
CPU_UP=0.5

#
# CPU idle work ratio to speed down
#
CPU_DOWN=0.9

#
# when using cputhrottling, what state to switch when speeding down
#
THROTTLING_LOW=7

################################################
# DISK OPTIONS
# (disabled by default)
################################################
#
# Timeout to put the disk in standby mode if there was no
# io during that period (in seconds)
#
#TIMEOUT=120

#
# Specified disks to spindown (comma separated devices)
#
# DISKS=/dev/hda,/dev/hdb

################################################
# EXTRA OPTIONS
################################################

# Available options are
# -acpi disables cpufreq and force the use of acpi
# -asus enables asus_acpi in some laptops
# -nice count also nice CPU usage as load as well
# -minf value Set the minimum CPU frequency in a value between 0.0 and 1.0
#
# EXTRA_OPTIONS=""