As far as I can see, the workaround is disabling kernel mode setting - just what I did, although in bug 417599 it's specific for intel cards.
-- Screen backlight doesn't come on when using kernel mode setting, intel https://bugs.launchpad.net/bugs/451071 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
