Phil Schumann

Another doc gotcha is that docs mention `umat` twice, as some sort of "unaligned support", but no `umat` stuff (funcs or types) exists in the actual sources.

> If I understand it correctly, the vsync wait should actually happen after present / before SDL_PollEvent. That way we fetch the input etc. right before we render the frame...

Btw it's not due to Nvidia, just tried on another (lower-end) machine with the exact-same setup (distro, kernel, Blender, Python, KDE versions all identical to above) but a different GPU...

@Hopefullyidontgetbanned whoa! Problem does **not** occur with 4.1.1! Which also embeds and uses Python 3.11.7.

Probably! I can by now confirm that the bug here is _definitely_ about the Python version: Just fetched 4.2.2 from blender.org which embeds and uses 3.11.7 (I checked) instead of...