I'm trying to get the full gnome experience and I was trying to switch from lightdm to gdm3. I did this by changing /etc/X11/default-display-manager
.
The problem is that, after closing the session, gdm3 never starts. After rebooting the system never shows the login screen and after a while I get the "default resolution" screen (which also doesn't work btw, since I can't select any of the options with the keyboard or the mouse).
I tried launching gdm3 from the console shell and it fails silently.