SDDM black login screen with mouse ponter

[mchnz]

@epp

Very similar to my issue, display shows a black screen with only the mouse pointer:

Twice today, the system has failed to provide the KDE login screen (SDDM) when the display comes out of sleep mode, on an X11 session. This has happened on Tumbleweed, fully-upgraded, installed to both an HDD and an external USB SSD. This has so far, not occurred with a Wayland session. System would be used normally, then I leave the desktop for 5-10 minutes. When I get back, the display is correctly in sleep mode (Samsung 22-inch monitor, blue power light is blinking). When pressing the space…

I’ve just encountered what you described, also in X11. I found I could alt-ctrl-F1 to a console and then login as root use loginctl to unlock the session (I suspect I didn’t need to be root):

1. Run loginctl to list sessions
2. Run loginctl unlock-session N

Hopefully that might work for you too.