ACPI: ibm-acpi: update documentation
Update documentation header, and relocate a hunk of text that was missplaced. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>hifive-unleashed-5.1
Henrique de Moraes Holschuh
Len Brown
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@ -1,16 +1,17 @@
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IBM ThinkPad ACPI Extras Driver
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Version 0.12
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17 August 2005
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Version 0.13
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31 December 2006
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Borislav Deianov <borislav@users.sf.net>
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Henrique de Moraes Holschuh <hmh@hmh.eng.br>
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http://ibm-acpi.sf.net/
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This is a Linux ACPI driver for the IBM ThinkPad laptops. It supports
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various features of these laptops which are accessible through the
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ACPI framework but not otherwise supported by the generic Linux ACPI
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drivers.
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ACPI framework but not otherwise fully supported by the generic Linux
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ACPI drivers.
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Status
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@ -638,6 +639,26 @@ The ThinkPad's ACPI DSDT code will reprogram the fan on its own when
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certain conditions are met. It will override any fan programming done
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through ibm-acpi.
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The ibm-acpi kernel driver can be programmed to revert the fan level
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to a safe setting if userspace does not issue one of the fan commands:
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"enable", "disable", "level" or "watchdog" within a configurable
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ammount of time. To do this, use the "watchdog" command.
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echo 'watchdog <interval>' > /proc/acpi/ibm/fan
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Interval is the ammount of time in seconds to wait for one of the
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above mentioned fan commands before reseting the fan level to a safe
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one. If set to zero, the watchdog is disabled (default). When the
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watchdog timer runs out, it does the exact equivalent of the "enable"
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fan command.
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Note that the watchdog timer stops after it enables the fan. It will
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be rearmed again automatically (using the same interval) when one of
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the above mentioned fan commands is received. The fan watchdog is,
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therefore, not suitable to protect against fan mode changes made
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through means other than the "enable", "disable", and "level" fan
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commands.
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EXPERIMENTAL: WAN -- /proc/acpi/ibm/wan
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---------------------------------------
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@ -670,59 +691,3 @@ example:
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modprobe ibm_acpi hotkey=enable,0xffff video=auto_disable
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The ibm-acpi kernel driver can be programmed to revert the fan level
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to a safe setting if userspace does not issue one of the fan commands:
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"enable", "disable", "level" or "watchdog" within a configurable
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ammount of time. To do this, use the "watchdog" command.
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echo 'watchdog <interval>' > /proc/acpi/ibm/fan
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Interval is the ammount of time in seconds to wait for one of the
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above mentioned fan commands before reseting the fan level to a safe
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one. If set to zero, the watchdog is disabled (default). When the
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watchdog timer runs out, it does the exact equivalent of the "enable"
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fan command.
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Note that the watchdog timer stops after it enables the fan. It will
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be rearmed again automatically (using the same interval) when one of
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the above mentioned fan commands is received. The fan watchdog is,
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therefore, not suitable to protect against fan mode changes made
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through means other than the "enable", "disable", and "level" fan
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commands.
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Example Configuration
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---------------------
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The ACPI support in the kernel is intended to be used in conjunction
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with a user-space daemon, acpid. The configuration files for this
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daemon control what actions are taken in response to various ACPI
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events. An example set of configuration files are included in the
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config/ directory of the tarball package available on the web
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site. Note that these are provided for illustration purposes only and
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may need to be adapted to your particular setup.
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The following utility scripts are used by the example action
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scripts (included with ibm-acpi for completeness):
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/usr/local/sbin/idectl -- from the hdparm source distribution,
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see http://www.ibiblio.org/pub/Linux/system/hardware
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/usr/local/sbin/laptop_mode -- from the Linux kernel source
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distribution, see Documentation/laptop-mode.txt
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/sbin/service -- comes with Redhat/Fedora distributions
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/usr/sbin/hibernate -- from the Software Suspend 2 distribution,
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see http://softwaresuspend.berlios.de/
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Toan T Nguyen <ntt@physics.ucla.edu> notes that Suse uses the
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powersave program to suspend ('powersave --suspend-to-ram') or
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hibernate ('powersave --suspend-to-disk'). This means that the
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hibernate script is not needed on that distribution.
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Henrik Brix Andersen <brix@gentoo.org> has written a Gentoo ACPI event
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handler script for the X31. You can get the latest version from
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http://dev.gentoo.org/~brix/files/x31.sh
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David Schweikert <dws@ee.eth.ch> has written an alternative blank.sh
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script which works on Debian systems. This scripts has now been
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extended to also work on Fedora systems and included as the default
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blank.sh in the distribution.
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