The problem I reported seems to be related to lightum. I deinstalled lightum via: sudo apt-get remove lightum restarted Ubuntu, and now I can change brightness level as usual using the keyboard.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/988202 Title: Ubuntu cannot automatically change brightness of screen and keyboard backlight in Macbook Air 4,2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988202/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
