My monitor is often turned off when I log in (I use the TV instead). I usually use screen mirroring (cloning) when logged in. But on the login screen, the mirroring doesn't work. Thus in my TV, I don't see the login form :( (the form is on the monitor which is turned off)
How can I enable mirroring in login screen? (afaik, I use X display manager, GDM3 greeter - standard Ubuntu 20.04 LTS).