Comment # 11 on bug 1179920 from Marc Balmer

(In reply to Takashi Iwai from comment #10)
> (In reply to Marc Balmer from comment #9)
> > Another observation:  On openSUSE Leap 15.2 the session type is wayland. 
> > And it runs a full res.  So it's definitely an issue in Tumbleweed.
> 
> Aha, that's an interesting finding.  I have no idea why the behavior differs
> wrt modesetting between X and Wayland.  I can imagine that Leap 15.2 kernel
> on TW might show the same problem, though; i.e. it's something in Wayland
> that limits the resolution.  Let's see.

FWIW, another "bleeding edge" Linux distribution that also uses Wayland, Fedora
33, displays the desktop at full native retina resolution.