I have stepped through all available kernel from -19 to -24. The last with which I am able to have backlight control working is the -22 (in fact almost working : after booting backlight does not work, but then if I suspend/resume the machine backlight control is working again).
I also tried mainline kernel 3.9.0-030900-generic which does not work either. I also tried xorg-edger nvidia drivers (319) with all tested kernels (all but the 3.9) but nothing worked. Now I use -22 kernel and nvidia-313-updates. Remember that I get this very same trouble with an Apple MacBookPro10,1 not with the Dell machine specified in this bug report. Do you think I should file a more general bug with reference to this one ? ** Also affects: linux Importance: Undecided Status: New ** No longer affects: linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1169376 Title: XPS13 backlight stopped working after update 3.8.0-18.28 To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1169376/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs