GDM starts but does not respond

Update and reboot seemed to go smoothly, but xdm freezes up part way through drawing the screen, and is completely unresponsive to mouse clicks or keyboard input.

I posted about the issue on the last stable updates topic, here: [Stable Update] 2025-02-04 - Kernels, KDE, XFCE, Mesa, Cosmic, Systemd - #96
Same problem after latest updates.
TIA for any suggestions.