The bug is not fixed in upstream kernel 3.17-rc3. I have tested the kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17-rc3-utopic/
** Tags added: kernel-bug-exists-upstream kernel-bug-exists- upstream-3.17-rc3 ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1364148 Title: Backlight turned off since upgrade to 3.13.0-35 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1364148/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs