it is, that seems like bug #1041137 then, can you check if that update fixes it:
gnome-session (3.6.2-0ubuntu2) raring; urgency=low * Add 04_consolekit_init_upower.patch: GsmConsoleKit: Properly initialize upower client. (LP: #1041137) (there is a SRU in the queue waiting for review with the fix as well) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1080344 Title: No effect on Suspend and Hibernate buttons in power button shutdown dialog Status in “gnome-settings-daemon” package in Ubuntu: Incomplete Bug description: On Unity Desktop, in the popup dialog that appears when the ACPI power button is pressed, the buttons to "suspend" and "hibernate" are non functional (see screenshot "screenshot of dialog in question"). Detailed info: Usually, when the ACPI power button on a laptop is pressed, the ACPI- daemon handles this event and issues a shutdown. However this is not the case when certain GUI's are running (the acpi shutdown handler explicitly checks for the presence of a gnome-settings-daemon process, among others.) When a user is running the Unity desktop, the process gnome-settings- daemon is running, and shows up a "popup". (see screenshot "screenshot of dialog in question") This popup asks the user whether he wants to - Suspend - Restart - Cancel - Shutdown and if the hibernate function has been enabled according to http://askubuntu.com/questions/94754/how-to-enable-hibernation also - Hibernate if no action is taken, the dialog executes selects the "Shutdown" feature after 60 seconds without user interaction. Of these buttons only "Restart", "Shutdown" and "Cancel" have the intended effect, "Shutdown" invokes a shutdown of the system "Cancel" simply closes the dialog. "Restart" causes a system restart However "Suspend" and "Hibernate" have the same effect as "Cancel". the dialog closes, but the system keeps running. (see sreenshot in attachment "screenshot of dialog in question") This bug only affects the Unity desktop. For example, the corresponding dialog in the ubuntustudio desktop works as expected. Also if "Suspend" or "Hibernate" are selected manually in the power menu from the Unity desktop, they ALSO work as expected. (see screenshot in attachment "on this menu everything works") ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: gnome-settings-daemon 3.4.2-0ubuntu14 ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7 Uname: Linux 3.5.0-18-generic x86_64 NonfreeKernelModules: fglrx ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 Date: Sun Nov 18 14:09:45 2012 EcryptfsInUse: Yes MarkForUpload: True SourcePackage: gnome-settings-daemon UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1080344/+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