Ubuntu
gnome-power-manager package

  1. Bug #503577
  2. Comment #3

Comment 3 for bug 503577

Revision history for this message
Paul Dufresne (paulduf) wrote :

Could it be:
 acpi_backlight= [HW,ACPI]
   acpi_backlight=vendor
   acpi_backlight=video
   If set to vendor, prefer vendor specific driver
   (e.g. thinkpad_acpi, sony_acpi, etc.) instead
   of the ACPI video.ko driver.
rather than acpi_brightness ?
which I don't find in: http://www.kernel.org/doc/Documentation/kernel-parameters.txt

Also, is it the brightness control you were using from http://library.gnome.org/users/gnome-power-manager/stable/applets-general.html.en ?