As of now update-manager does only support restarting via gnome-session-manager and consolekit (fallback). However, Xubuntu 13.10 does not ship with consolekit anymore, so support for restarting via logind needs to be added.
As of now update-manager does only support restarting via gnome-session- manager and consolekit (fallback). However, Xubuntu 13.10 does not ship with consolekit anymore, so support for restarting via logind needs to be added.