[ 618.131916] i915 0000:00:02.0: [drm] *ERROR* Atomic update failure on pipe B (start=36634 end=36635) time 217 us, min 1431, max 1439, scanline start 1421, end 1440
which I think can only happen in Xorg sessions.
Try selecting 'Ubuntu on Wayland' from the login screen before you enter your password.
Your kernel log mentions:
[ 618.131916] i915 0000:00:02.0: [drm] *ERROR* Atomic update failure on pipe B (start=36634 end=36635) time 217 us, min 1431, max 1439, scanline start 1421, end 1440
which I think can only happen in Xorg sessions.
Try selecting 'Ubuntu on Wayland' from the login screen before you enter your password.