Arch Linux

Blind

Member

From: Desert mountain

Registered: 2005-02-06

Posts: 386

Best information source to help configure PM - fan control

Hi guys,
although I see a lot of solutions of small bits of problems I always try to find a _general_ instruction set of how to configure my laptop to sleep if I hit the sleep button (at all possible??) or suspend to disk or whatever other power saving gimmicks a laptop offers. I realize every laptop is different, but is there not a general approach? Or some scripts that can easily be adjusted?
I have adopted some script to control my fans; this runs more or less satisfactory now... but all the other things seem to take an incredible amount of time to find out.

Thanks for your help,
Blind

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: Best information source to help configure PM - fan control

ACPI Howto?

Blind

Member

From: Desert mountain

Registered: 2005-02-06

Posts: 386

Re: Best information source to help configure PM - fan control

Thanks for your answer, tomk.
A nice resource page - although present in the link list on that page, I want to point out ACPI4Linux.

Now I have a specific problem. I have - as mentioned - adopted and modified a rc script file. It makes use of the normal ACPI fan and temperature control functions. For your reference and statements (always welcome!):

#!/bin/sh
#
# description: Switches the fan control on

. /etc/rc.conf
. /etc/rc.d/functions

case "$1" in
    start)
      stat_busy "Starting fan control"
      # Turn fans on
      echo -n 0 > /proc/acpi/fan/FN1/state
      echo -n 0 > /proc/acpi/fan/FN2/state
      # Format: Critical:Hot:Passive:Active0:Active1
      echo -n "80:70:65:55:50" > /proc/acpi/thermal_zone/THRM/trip_points
      # Activate the kernel's temperature control system
      echo 60 > /proc/acpi/thermal_zone/THRM/polling_frequency 
      # Turn fans off
      echo -n 3 > /proc/acpi/fan/FN1/state
      echo -n 3 > /proc/acpi/fan/FN2/state
      stat_done
      ;;
    stop)
      stat_busy "Stopping fan control"
      # Turn fans on
      echo -n 0 > /proc/acpi/fan/FN1/state
      echo -n 0 > /proc/acpi/fan/FN2/state
      stat_done
      ;;
    status)
      echo -n "Fan 1 "
      cat /proc/acpi/fan/FN1/state
      echo -n "Fan 2 "
      cat /proc/acpi/fan/FN2/state
      ;;
    restart)
      $0 stop
      $0 start
      ;;
    *)
      echo "usage: $0 {start|restart|stop|status}"  
esac

exit 0

My problem is: It works fine for some time but after a while, although the temperature is below Active1, the fans don't stop rotating - as if the kernel had forgotten my settings. I have no clue whatsoever why.
Thanks for your comments,
Blind