I add to tigobos' comment that I tried to upgrade using the apt-get way, but got the same kind of problem: Later the screensaver was on and it had forgotten my password! Now I am stuck with uncompleted upgrade. I think people should be advised to turn off any screensaver before upgrading.
-- sudo update-manager -c -d crashes during xubuntu upgrade https://launchpad.net/bugs/68027 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
