After backporting Xwayland randr resolution change emulation emulation to the xserver in Fedora 31, I reran my entire set of tests and noticed that some corner cases which have been broken by the refactoring done during review. Specifically: ClanLib-0.6.x, alleggl-4.4.x and ogre3d based apps would not fullscreen properly.
This merge-requests contains a set of fixes which make Xwayland randr resolution change emulation emulation also work properly with these apps.