Comment 20 for bug 1970884

For the record from matrix:
> robert.mader
> jmaher: for the record, "wayland on xvfb == xwayland" sounds wrong to me. Xwayland runs on top of Wayland, so Xwayland would imply "x11 on wayland on xvfb". So if a nested Wayland session runs on top of xvfb, that's entirely valid.
"Wayland on native backend" would certainly be better than "Wayland on X11 backend", but for docker tests the later should be fine for now.
> jmaher
> robert.mader: ok, then maybe this isn't such a hard problem to solve- I was reading up on it and kept running into more resources about pure Wayland without xvfb; I will keep looking into this a bit more
> robert.mader
> jmaher: Gnome-Shell/Mutter only supports native headless Wayland mode since very recently (since Gnome 40), see https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1698. Ubuntu 21.04 still ships 3.38 (because of big UI changes, also mind the versioning switch). So IIUC this will only work from Ubuntu 21.10 on :/
> jmaher
> ok, that seems very new- probably not what we want right now