Ubuntu
update-manager package

  1. Bug #370466
  2. Comment #5

Comment 5 for bug 370466

Revision history for this message
Sandro Mani (sandromani) wrote : Re: update-manager sets display brightness to 100%

I found the cause of the problem, which is that for some reason update-manager starts a gnome-power-manager instance as root, which then is responsable for the backlight change.