Jannes- if you no your model and make go onto samsung website and go onto download centre and look for Easy Display Manager that's what i have done as i had the same problem, and it has worked for me, i am now able to adjust my brightness etc.
-- backlight brighness control does not work (Samsung Q45 with Nvidia GForce 8400M) https://bugs.launchpad.net/bugs/146710 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
