Solved!
Thanx to Maxny in this thread: Qubes OS doesn't boot at all (Dell XPS 8940) - #7 by Maxny
Yeah, it was GPU. I booted with Qubes-20220312-kernel-latest-x86_64.iso with kernel 5.16 and everything works now.
Downloaded latest kernel builds here:
https://qubes.notset.fr/iso/
Btw, does anybody know who’s archives are those? Seems they are on a weekly schedule…
Case closed.
Again, thanx to Maxny (i own you a beer, man ;))