XFCE: Unable to perform shutdown
At some point during the Jaunty test cycle shutting down and rebooting the machine stopped working with the Action Buttons menu applet – It would fail with the message “Unable to perform shutdown” and some HAL-related messages. While annoying I didn’t put any real effort into solving the problem, until today. I didn’t have to look long though as the answer was in the Arch Linux forum. Open the file /etc/PolicyKit/PolicyKit....