On 16.04 (and 14.04), the following link fixed it for me: https://itsfoss.com/fix-brightness-ubuntu-1310/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1255428 Title: 8086:0116 [Lenovo IdeaPad Z570] LCD brightness control keys and widget do not work on Intel Graphics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1255428/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
