Comment 58 for bug 1240336

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GiaBao Phu Truong (2908bg) wrote : Re: Not authorized to perform operation / Unable to determine the session we are in: No session for pid

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.