I am using Utopic Unicorn dev. branch and see the same problem. My display manager is lightdm and I use gnome-shell as window manager.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-session in Ubuntu. https://bugs.launchpad.net/bugs/1312223 Title: gnome-session-quit does not work Status in “gnome-session” package in Ubuntu: Confirmed Bug description: When I go to the session menu -> Shutdown, or run gnome-session-quit --power-off, the dialog that appears does nothing. If I click the shutdown or restart button, the dialog closes but does nothing, the PC doesn't shutdown or restart. I have this problem from Ubuntu 13.10, I updated to 14.04 and the problem remains. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: gnome-session-bin 3.9.90-0ubuntu12 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Thu Apr 24 11:45:48 2014 InstallationDate: Installed on 2012-08-02 (630 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) SourcePackage: gnome-session UpgradeStatus: Upgraded to trusty on 2014-04-21 (3 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1312223/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp