Ubuntu
xserver-xorg-video-ati package

  1. Bug #1264272
  2. Comment #6

Comment 6 for bug 1264272

Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

With "acpi_backlight=vendor" added into grub,
the screen brightness could be adjusted correctly.

Debugging information:
$ ls /sys/class/backlight
radeon_bl0