Screen won't dim

Question

On another (third laptop I've put arch on) computer, the screen won't dim automatically. It's using gnome and when I unplug the power cord, the OSD comes up showing a lower value but the screen stays the same.

Answer 1

I've got it somewhat going now using acpid. I'm just not sure which to use under battery and A/C and which of those to use. Right now, it dims when unplugged but nothing when I replug. Actually, all it does is dim, when there is a switch.
[#!/bin/sh
# Default acpi script that takes an entry for all actions
# NOTE: This is a 2.6-centric script. If you use 2.4.x, you'll have to
# modify it to not use /sys
minspeed=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq`
maxspeed=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq`
setspeed="/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed"
set $*
case "$1" in
button/power)
#echo "PowerButton pressed!">/dev/tty5
case "$2" in
PWRF) logger "PowerButton pressed: $2" ;;
*) logger "ACPI action undefined: $2" ;;
esac
button/sleep)
case "$2" in
SLPB) echo -n mem >/sys/power/state ;;
*) logger "ACPI action undefined: $2" ;;
esac
ac_adapter)
case "$2" in
AC)
case "$4" in
00000000)
echo -n $minspeed >$setspeed
#/etc/laptop-mode/laptop-mode start
xbacklight -set 100
00000001)
echo -n $maxspeed >$setspeed
#/etc/laptop-mode/laptop-mode stop
xbacklight -set 30
esac
*) logger "ACPI action undefined: $2" ;;
esac
battery)
case "$2" in
BAT0)
case "$4" in
00000000) #echo "offline" >/dev/tty5
xbacklight -set 100
00000001) #echo "online" >/dev/tty5
xbacklight -set 30
esac
CPU0)
*) logger "ACPI action undefined: $2" ;;
esac
button/lid)
#echo "LID switched!">/dev/tty5
/usr/sbin/pm-suspend --quirk-s3-bios --quirk-s3-mode
logger "ACPI group/action undefined: $1 / $2"
esac
Last edited by Reasons (2008-01-21 16:28:45)