cleaning the custom configuration file /etc/gdm/gdm.conf-custom is another work around. After that the standard greeter is working without problems.
-- gdm hangs after theme upgrade and reboot https://bugs.launchpad.net/bugs/210538 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
