Ubuntu
linux package

  1. Bug #776999
  2. Comment #82

Comment 82 for bug 776999

Revision history for this message
Ingo Bürk (ingo-buerk) wrote :

Please reopen. This happens to me for Ubuntu 14.04 on a Lenovo T530 with nvidia drivers. It only happens when I switch to Discrete Graphics in the BIOS, but running in Optimus breaks other things (cannot change the virtual layout of external screens without glitches).

Using all the proposed kernel parameters in this thread so far as well as adding the EnableBrightnessControl line only prevents freezing the system, but the brightness does not change. I also tried xbacklight and changing the value in /sys/class/brightness/.../brightness.