Ibm-acpi

2007-07-26T01:08:48Z

Wide-eye: added fan_control option for kernel 2.6.22

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=== ibm-acpi - IBM ThinkPad ACPI Extras Driver ===
This is a Linux ACPI driver for the IBM ThinkPad laptops written by Borislav Deianov, and currently maintained by [[User:hmh|Henrique de Moraes Holschuh]]. It aims to support various features of these laptops which are accessible through the ACPI framework but not otherwise supported by the generic Linux ACPI drivers. As a kernel module, ibm-acpi works as a bridge to deliver information about certain hardware events like key presses or control the state of certain hardware features by software.
{{NOTE|The ibm-acpi driver is going to be renamed to thinkpad-acpi on Linux kernel 2.6.22}}
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=== Features ===
*triggers ACPI Events for
** [[How_to_get_special_keys_to_work | Fn key combinations]] ({{key|Fn}}{{key|F1}}, {{key|Fn}}{{key|F2}}, {{key|Fn}}{{key|F3}}, {{key|Fn}}{{key|F4}}, {{key|Fn}}{{key|F5}}, {{key|Fn}}{{key|F6}}, {{key|Fn}}{{key|F7}}, {{key|Fn}}{{key|F8}}, {{key|Fn}}{{key|F9}}, {{key|Fn}}{{key|F10}}, {{key|Fn}}{{key|F11}}, {{key|Fn}}{{key|F12}})
** [[UltraBay]] device eject (see also [[How to hotswap UltraBay devices]])
** Display lid, Power button, Undock button
*enables control via /proc files of
** Bluetooth
** Video output switching, video expansion control
** Docking and undocking (limited)
** Fan (on most models, only enable/disable; speed control is added by a further [[Patch for controlling fan speed|patch]])
** Volume
** LCD Brightness
** [[ThinkLight]]
** [[Table_of_ibm-acpi_LEDs| LEDs]]
** [[Error Codes and Beep Codes|Beep]] codes
** Several CMOS states
* can show values of
** [[Thermal Sensors|Sixteen temperature sensors]]
** Embedded Controler registers
** Fan status and speed

Some of these features are available only when the module is loaded with the <tt>experimental=1</tt> option. To enable it, add the following to {{path|/etc/modprobe.conf}} (or your distribution's equivalent):
options ibm_acpi experimental=1

for kernels 2.6.22 and above fan control is enabled with the following in /etc/modprobe.conf:
options thinkpad_acpi fan_control=1

=== Project Homepage / Availability ===
* Homepage: http://ibm-acpi.sourceforge.net/
* Public releases: http://sourceforge.net/project/showfiles.php?group_id=117042
* ibm-acpi is included with the Linux kernel since 2.6.10.
* Mailing list: [[Mailinglists#ibm-acpi_Developers_Mailinglist|ibm-acpi-devel]]
* [[Git]] repository: git://repo.or.cz/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git ([http://repo.or.cz/w/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git browse])

=== Status ===
In development, usable, actively maintained. Patches should go to the ibm-acpi-devel [[mailinglists|mailing list]].

Even if you have disabled the BIOS setting for automatically dimming at battery power, after using the brightness switch of ibm-acpi, the auto-dimming behavior is enabled. So, if you need a bright display even on battery power, you should not set any brightness via /proc/acpi/ibm/brightness.

=== Application support===
* [http://www.gkrellm.net GKrellM] supports fan and thermal information
* [http://www.joachim-breitner.de/blog/archives/38-Created-gaim-thinklight.html gaim-thinklight] is a gaim plugin which makes the [[ThinkLight]] blink, when a message arrives.
* [http://www.chris-lamb.co.uk/code/gaim-lightthink/ gaim-lightthink] is an alternative to gaim-thinklight.
* [http://hunz.org/ rocklight] is a xmms visualization plugin that makes the ThinkLight flash to the beat of your music. The package also includes a standalone stroboscope mode program.
* [http://www.zolnott.de/software/applications/ibm-acpi-applet-for-gnome-210-and-higher.html IBM ACPI applet] is a small gnome panel applet which shows the fan speed and thermal informations
* [[ACPI fan control script|ACPI fan control scripts]] can be used to control the system fan according to system temperatures (overriding the firmware)

=== Interesting links related to this project ===
* [http://ibm-acpi.sf.net ibm-acpi Sourceforge project summary]
* [https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel ibm-acpi-devel Mailinglist] [http://gmane.org/info.php?group=gmane.linux.acpi.ibm-acpi.devel (List archive on gmane.org)]
* [http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad Linux-Thinkpad Mailinglist]
* [http://acpi.sourceforge.net acpi.sourceforge.net]
* [http://www.kernel.org www.kernel.org]

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