Ubuntu
gnome-power-manager package

  1. Bug #818826
  2. Comment #3

Comment 3 for bug 818826

Revision history for this message
kapouer (kapouer) wrote :

/sys/class/backlight/acpi_video0/brightness
is present, but does not have any effect when imac is booted in EFI mode.
It does work when booted in legacy BIOS mode.