I tried to install Qubes OS 4.2.3 on my ThinkPad laptop. The installation went smoothly and laptop rebooted into the configuration. I kept everything at the default. Then after the configuration I got text screen with system-d messages, but there was no GUI:
I can see that I can switch to a login console using Ctrl-Alt-f2 and login there to dom0. I tried to restart lightdm.service, systemctl restart lights.service reported a success but there was no attempt to start GUI, no screen flickering or similar, the system continued to show consoles or systemd log.
Rebooting lead to the same situation. Systemd log screen and working access to try consoles, but no UI.
Any clues how to debug this?