When I log out of my Wayland session with the Hyprland compositor, I get a black screen with a flashing cursor, but can’t type anything. I then have to reboot, and only then does SDDM work as expected, albeit with a few seconds delay.
I Have reproduced the error several times using Hyprland, wlogout, and SDDM on a Tuxedo Stellaris 15 with Nvidia GeForce RTX 3080, driver version 550.54.14 and Cuda 12.4.
I have not been able to find anything enlightening in the logs, as the warnings there also also there when I set the display manager to GDM and logout behaves as expected.