Thank you for your bug report, do you have several users logged in when that happens? Could you get a ck-list-sessions log when you run into the issue? It seems similar to bug #855556
** Changed in: lightdm (Ubuntu) Importance: Undecided => Low ** Changed in: lightdm (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/883181 Title: shutdown/restart broken after upgrade from natty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/883181/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs