ACPI action script for battery events

This is an example ACPI action script that makes Power Management adjustments according to if you are on battery or on AC. Usually this is saved as /etc/acpid/actions/battery.sh.

#!/bin/sh

1. Tried on Gentoo
2. cpu throttling is in here it is the cpufreq-set lines
3. turning swap off is only for those that feel comfortable
4. doing something this nasty.
5. comment out the laptop_mode line if you don't have it installed
6. pcfe, 2008-10-28

1. cpu throttling
2. cat /proc/acpi/processor/CPU0/throttling for more info

ACAD_THR=0 BATT_THR=2

1. spindown time for HD (man hdparm for valid values)
2. I prefer 2 hours for acad and 2 min for batt

ACAD_HD=244 BATT_HD=24

1. Power management level
2. 255 (off) on AC
3. 128 (medium) on batt
4. lowered to 32, pcfe, 2004-06-23
5. upped to 64, pcfe, 2004-07-14
6. upped to 96, pcfe, 2004-10-20

ACAD_PM=255 BATT_PM=96

1. ac/battery event handler

status=`awk '/^state: / { print $2 }' /proc/acpi/ac_adapter/AC/state`

if [ "$status" = "off-line" ] then

              logger "Running /sbin/laptop_mode stop"
              /sbin/laptop_mode stop
              logger "Setting HD spindown for AC mode with hdparm -S $ACAD_HD /dev/hda."
              /sbin/hdparm -S $ACAD_HD /dev/hda > /dev/null 2>&1
              logger "Setting HD powersaving for AC mode with hdparm -B $ACAD_PM /dev/hda."
              /sbin/hdparm -B $ACAD_PM /dev/hda > /dev/null 2>&1
              logger "Turning on swap."
              /sbin/swapon -a

/usr/bin/cpufreq-set -g conservative else

              logger "Turning off swap."
              /sbin/swapoff -a
              logger "Running /sbin/laptop_mode start"
              /sbin/laptop_mode start
              logger "Setting HD spindown for battery mode with hdparm -S $BATT_HD /dev/hda."
              /sbin/hdparm -S $BATT_HD /dev/hda > /dev/null 2>&1
              logger "Setting HD powersaving for battery mode with hdparm -B $BATT_PM /dev/hda."
              /sbin/hdparm -B $BATT_PM /dev/hda > /dev/null 2>&1
              /usr/bin/cpufreq-set -g ondemand

fi