This seems to be related to bug #604197. The best would be to fix this in gksu, to show the gksu window until the password is either correct or the dialog is cancelled.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/689180 Title: update-manager doesn't report authentication failure -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
