I recently upgraded a couple of my machines from Ubuntu MATE 16.04 to 18.04. On both of them, I noticed that after the upgrade, the login window did not look correct. There was no background image. It didn’t look like a fresh 18.04 install. Plus, any changes I did in the Administration -> Login Window … Continue reading Fix: Ubuntu MATE 18.04 login screen is empty after upgrade from 16.04