Etwas

olaf@pc:/etc$ gksudo update-manager
warning: could not initiate dbus
extracting '/tmp/tmpaQDp-b/gutsy.tar.gz'
authenticate '/tmp/tmpaQDp-b/gutsy.tar.gz' against '/tmp/tmpaQDp-b/gutsy.tar.gz.gpg' 
could not send the dbus Inhibit signal: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.