I have included a workaround for this on the patch attached to Bug 1565178.
There I have added a gnome-session inhibitor to block the screensaver, on Ubuntu GNOME we will leave this running do if the user exits the installer (rather than press restart button). They will have no screen lock until the next reboot, seems somewhat better than a locked screen to can't be unlocked. ** Changed in: gdm3 (Ubuntu) Status: New => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1565178 Title: Screen lock broken after release upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-gnome/+bug/1565178/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs