I have exactly the same issue on my Macbook11,1 starting a couple of weeks ago with Vivid. It does not seem to be a kernel issue and the /sys brightness interfaces are present and working fine.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1392101 Title: Brightness controls not working on intel igfx To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392101/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
