Ubuntu
linux package

  1. Bug #990326
  2. Comment #5

Comment 5 for bug 990326

Revision history for this message
Malte S. Stretz (mss) wrote :

This isn't a bug in gnome-power-manager since it affects KDE as well. Actually, it looks like the kernel (?) ignores whatever is written to /sys/class/backlight/acpi_video0/brightness; I can set it to zero and still no change:

$ ls /sys/class/backlight/
acpi_video0
$ cat /sys/class/backlight/acpi_video0/max_brightness
20
$ cat /sys/class/backlight/acpi_video0/brightness
20
$ echo 0 | sudo tee /sys/class/backlight/acpi_video0/brightness
0
$ cat /sys/class/backlight/acpi_video0/brightness
0