Same problem also appeared after update on friday. Also hitting restart takes me to the splash screen but pc then hangs.
'sudo shutdown -h now' will shut the machine down. One thread (/ubuntuforums.org/showthread.php?t=175384) said to install gnome power manager. But synaptic tells me it was unable to find this. So I havent been able to test this. Martin dapper 6.06 gnome panel 2.14.1 -- shutdown button does not shutdown but log out https://launchpad.net/bugs/44514 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs