Ubuntu
gnome-power-manager package

  1. Bug #249568
  2. Comment #16

Comment 16 for bug 249568

Revision history for this message
Thomas Champagne (lafeuil) wrote :

Hi
I have the same problem 3 years ago and I never solve it. I create a lot of bug reports in various project :
In gnome-power-manager : https://bugzilla.gnome.org/show_bug.cgi?id=550524
In radeon driver : https://bugs.freedesktop.org/show_bug.cgi?id=19168

The problem is that I don't know where is exactly the bug. On Xorg, Radeon driver, gnome-power-manager ?

Gnome-power-manager switch off backlight calling this similar command : xset dpms force off.

But on Ibook, there isn't DPMS feature. The xorg server logs this in /var/log/Xorg.0.log :
(II) RADEON(0): No DPMS capabilities specified

So, when the command is called, the screen is black but the backlight is always on....
The solution to switch off backlight is to put backlight to 0.

Please help me :-p