Hello. Sorry for the delay. I've now installed Trusty and the problem persists. However the solution provided by http://askubuntu.com/a/395442/170127 works. (The command line option detailed at http://askubuntu.com/a/382833/170127 works as well.)
** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- 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 on Saucy To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1255428/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs