Daniel, did you actually reinstalled Ubuntu in UEFI mode? because it fixed the issue for me. Simply switching BIOS mode to UEFI mode doesn't help. Your system still boots in Legacy mode. You have to have Ubuntu installed in UEFI mode in order for brightness to work.
-- 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 [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
