Same happen with Ubuntu 14.04.3 64 bit, I had 14.04.2 x86 and worked fine with graphic controller "Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)" but when updated to a 64 bit due to notebook capabilities just did not worked...
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1403792 Title: brightness of one of two screens no longer adjustable with hotkeys and menu To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1403792/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs