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>
This commit is contained in:
Henrique de Moraes Holschuh
Len Brown
parent
a62bc916cf
commit
38f996ed21
|
|
@ -1,16 +1,17 @@
|
|||
IBM ThinkPad ACPI Extras Driver
|
||||
|
||||
Version 0.12
|
||||
17 August 2005
|
||||
Version 0.13
|
||||
31 December 2006
|
||||
|
||||
Borislav Deianov <borislav@users.sf.net>
|
||||
Henrique de Moraes Holschuh <hmh@hmh.eng.br>
|
||||
http://ibm-acpi.sf.net/
|
||||
|
||||
|
||||
This is a Linux ACPI driver for the IBM ThinkPad laptops. It supports
|
||||
various features of these laptops which are accessible through the
|
||||
ACPI framework but not otherwise supported by the generic Linux ACPI
|
||||
drivers.
|
||||
ACPI framework but not otherwise fully supported by the generic Linux
|
||||
ACPI drivers.
|
||||
|
||||
|
||||
Status
|
||||
|
|
@ -638,6 +639,26 @@ The ThinkPad's ACPI DSDT code will reprogram the fan on its own when
|
|||
certain conditions are met. It will override any fan programming done
|
||||
through ibm-acpi.
|
||||
|
||||
The ibm-acpi kernel driver can be programmed to revert the fan level
|
||||
to a safe setting if userspace does not issue one of the fan commands:
|
||||
"enable", "disable", "level" or "watchdog" within a configurable
|
||||
ammount of time. To do this, use the "watchdog" command.
|
||||
|
||||
echo 'watchdog <interval>' > /proc/acpi/ibm/fan
|
||||
|
||||
Interval is the ammount of time in seconds to wait for one of the
|
||||
above mentioned fan commands before reseting the fan level to a safe
|
||||
one. If set to zero, the watchdog is disabled (default). When the
|
||||
watchdog timer runs out, it does the exact equivalent of the "enable"
|
||||
fan command.
|
||||
|
||||
Note that the watchdog timer stops after it enables the fan. It will
|
||||
be rearmed again automatically (using the same interval) when one of
|
||||
the above mentioned fan commands is received. The fan watchdog is,
|
||||
therefore, not suitable to protect against fan mode changes made
|
||||
through means other than the "enable", "disable", and "level" fan
|
||||
commands.
|
||||
|
||||
EXPERIMENTAL: WAN -- /proc/acpi/ibm/wan
|
||||
---------------------------------------
|
||||
|
||||
|
|
@ -670,59 +691,3 @@ example:
|
|||
|
||||
modprobe ibm_acpi hotkey=enable,0xffff video=auto_disable
|
||||
|
||||
The ibm-acpi kernel driver can be programmed to revert the fan level
|
||||
to a safe setting if userspace does not issue one of the fan commands:
|
||||
"enable", "disable", "level" or "watchdog" within a configurable
|
||||
ammount of time. To do this, use the "watchdog" command.
|
||||
|
||||
echo 'watchdog <interval>' > /proc/acpi/ibm/fan
|
||||
|
||||
Interval is the ammount of time in seconds to wait for one of the
|
||||
above mentioned fan commands before reseting the fan level to a safe
|
||||
one. If set to zero, the watchdog is disabled (default). When the
|
||||
watchdog timer runs out, it does the exact equivalent of the "enable"
|
||||
fan command.
|
||||
|
||||
Note that the watchdog timer stops after it enables the fan. It will
|
||||
be rearmed again automatically (using the same interval) when one of
|
||||
the above mentioned fan commands is received. The fan watchdog is,
|
||||
therefore, not suitable to protect against fan mode changes made
|
||||
through means other than the "enable", "disable", and "level" fan
|
||||
commands.
|
||||
|
||||
|
||||
Example Configuration
|
||||
---------------------
|
||||
|
||||
The ACPI support in the kernel is intended to be used in conjunction
|
||||
with a user-space daemon, acpid. The configuration files for this
|
||||
daemon control what actions are taken in response to various ACPI
|
||||
events. An example set of configuration files are included in the
|
||||
config/ directory of the tarball package available on the web
|
||||
site. Note that these are provided for illustration purposes only and
|
||||
may need to be adapted to your particular setup.
|
||||
|
||||
The following utility scripts are used by the example action
|
||||
scripts (included with ibm-acpi for completeness):
|
||||
|
||||
/usr/local/sbin/idectl -- from the hdparm source distribution,
|
||||
see http://www.ibiblio.org/pub/Linux/system/hardware
|
||||
/usr/local/sbin/laptop_mode -- from the Linux kernel source
|
||||
distribution, see Documentation/laptop-mode.txt
|
||||
/sbin/service -- comes with Redhat/Fedora distributions
|
||||
/usr/sbin/hibernate -- from the Software Suspend 2 distribution,
|
||||
see http://softwaresuspend.berlios.de/
|
||||
|
||||
Toan T Nguyen <ntt@physics.ucla.edu> notes that Suse uses the
|
||||
powersave program to suspend ('powersave --suspend-to-ram') or
|
||||
hibernate ('powersave --suspend-to-disk'). This means that the
|
||||
hibernate script is not needed on that distribution.
|
||||
|
||||
Henrik Brix Andersen <brix@gentoo.org> has written a Gentoo ACPI event
|
||||
handler script for the X31. You can get the latest version from
|
||||
http://dev.gentoo.org/~brix/files/x31.sh
|
||||
|
||||
David Schweikert <dws@ee.eth.ch> has written an alternative blank.sh
|
||||
script which works on Debian systems. This scripts has now been
|
||||
extended to also work on Fedora systems and included as the default
|
||||
blank.sh in the distribution.
|
||||
|
|
|
|||
Loading…
Reference in New Issue