Public bug reported:
Binary package hint: gnome-power-manager
When iBook is powered from a battery, the screen is blanked after a
period of inactivity, but backlight isn't turned off. I'd expect GNOME
Power Manager to turn off the backlight as well to save battery and/or
make backlight lamp live longer. Unfortunately I don't remember if the
backlight worked properly in previous versions.
Backlight can be turned on and off manually, so the kernel driver
supports it properly:
$ echo 0 | sudo tee -a /sys/class/backlight/radeonbl0/brightness
$ echo 127 | sudo tee -a /sys/class/backlight/radeonbl0/brightness
GNOME Power Manager settings are:
$ gconftool-2 -R /apps/gnome-power-manager/backlight
idle_dim_battery = true
dpms_method_battery = off
idle_brightness = 30
dpms_method_ac = default
idle_dim_time = 30
brightness_battery = 70
enable = true
idle_dim_ac = false
battery_reduce = true
brightness_ac = 100
Distribution: Hardy Heron 8.04
Hardware: iBook G4
Graphics: ATI Radeon Mobility 9200 (M9+) 5C63 (AGP)
Packages: gnome-power-manager 2.22.1-1ubuntu4
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
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Backlight isn't turned off after inactivity on iBook G4
https://bugs.launchpad.net/bugs/249568
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