Hello can you try out the fix described in the forum http://ubuntuforums.org/showthread.php?p=10342807 And report if this fixes the issue for you Cheers
** Changed in: ubuntu Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/711854 Title: switch off knob hidden -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs