> Failed to post KMS update: drmModePageFlip on CRTC 33 failed: Nicht genügend Hauptspeicher verfügbar
The messages before that are expected and not errors.
To avoid this problem you should be able to select 'Ubuntu' on the login screen, since it sounds like the problem is unique to the 'Ubuntu on Wayland' option.
The main issue appears to be:
> Failed to post KMS update: drmModePageFlip on CRTC 33 failed: Nicht genügend Hauptspeicher verfügbar
The messages before that are expected and not errors.
To avoid this problem you should be able to select 'Ubuntu' on the login screen, since it sounds like the problem is unique to the 'Ubuntu on Wayland' option.