This still happens on Ubuntu 20.04 (Focal), too. In my case, I have one external monitor which is mirrored. But the login screen appears only on the laptop's screen but not on the external monitor's display.
This still happens on Ubuntu 20.04 (Focal), too. In my case, I have one external monitor which is mirrored. But the login screen appears only on the laptop's screen but not on the external monitor's display.