I found this issue is fixed in Linux kernel. Please see http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6dda730e55f412a6dfb181cae6784822ba463847.
** Changed in: unity-settings-daemon Status: Incomplete => Invalid ** Changed in: gnome-desktop3 (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1340544 Title: gnome-rr: Normalize the minimum brightness level. To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-desktop/+bug/1340544/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs