SonWon, please file a new bug for your issue, where you include more information on your hardware.
This bug is not about problems with suspend and hibernation, solely that the choices in the menu in the GDM greeter do not work. -- Suspend (or hibernate) does nothing https://launchpad.net/bugs/3642 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
