Have this on Ubuntu 14.10 Utopic. Try everything mentioned above but nothing work.
When first start at the login screen, I can shutdown/ restart/ suspend by using the button at the top panel. After login to the account I have this bugs and can't shutdown/ restart/ suspend without 'sudo' command line. Logout to the login screen again, I lost the ability to shutdown/ restart/ suspend via the button at the top panel too. Reboot the system and everything happen again. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm in Ubuntu. https://bugs.launchpad.net/bugs/1240336 Title: Not authorized to perform operation / Unable to determine the session we are in: No session for pid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/1240336/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs