If it happens again please test it with VLC or Mplayer. I had a similar problem, brightness reset after GDM or video player start but not with Totem. Please also attacht your /etc/X11/xorg.conf .
-- Starting up a virtual machine in a virtualbox changes the display brightness (again) https://bugs.launchpad.net/bugs/241195 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs