GDM failed to start
The screen is hang on a text mode, all black with only the cursor blinking at the upper
left corner.
Ctrl+Alt+F3 switching works, and sway can be started without issues.
Yesterday still worked normally, but after some update, it shows this problem.
Silverblue Rawhide.20210511.n.2 is working (double checked with fresh install)
Silverblue 34.20210516.0 failed
https://bugzilla.redhat.com/show_bug.cgi?id=1960937