Oddly enough this worked. I went into GRUB and tried the systemd-option and this made the login screen work again.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm in Ubuntu. https://bugs.launchpad.net/bugs/1414707 Title: Login fails, returns to login and flickering prevents password typing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/1414707/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs