@emilis
>single frame
That's how it usually is.

>throw that down to an xorg/hlwm bug
Depends on what exactly you saw. It's not impossible, but unlikely unless you have multiple stuff that used the GPU at the same time. Like your DE, a game and a video playing via hardware decoding in the background.

If it's a whole screen glitch, it's likely a software bug or cable problem. If it's just the texture on a 3D model, or part of a model, that's usually the telltale sign of GPU misfiring.

@alyx@gameliberty.club I did have a game running in another virt desktop
It was like, a few squares near the top left, it wasn’t big
On firefox