Getting the same here, and I, occasionnaly, return back to login screen... Deleting /etc/gdm/custom.conf seemed to solve the issue ([xdmcp] and [greeter] were filled).
Getting the same here, and I, occasionnaly, return back to login screen... Deleting /etc/gdm/ custom. conf seemed to solve the issue ([xdmcp] and [greeter] were filled).