Bug may be closed, issue is due our installation environment not Ubuntu. Alessandro's comment helped track down the issue, so thank you and sorry for wasting your time.
Summary of issue on our end: Following was found in our custom imaging process that creates this file manually (for adding system-db:gdm), which broke logins due to the new required missing file-db line: Incorrect file contents (/etc/dconf/profile/gdm): user-db:user system-db:gdm Corrected file contents (/etc/dconf/profile/gdm): user-db:user system-db:gdm file-db:/var/lib/gdm3/greeter-dconf-defaults Validated by: apt-get download gdm3=50~beta-0ubuntu3 dpkg-deb -x gdm3_50~beta-0ubuntu3_amd64.deb /tmp/gdm3-50-validate cat /tmp/gdm3-50-validate/usr/share/dconf/profile/gdm user-db:user file-db:/var/lib/gdm3/greeter-dconf-defaults -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2143268 Title: gnome-shell launches in desktop mode instead of greeter mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/2143268/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
