Krita may use OpenGL, I don't know if it's always in use or it's optional, but I'm positive GIMP doesn't: GIMP is a GTK app and therefore likely uses something like Cairo, which itself ends up using OpenGL either through the display manager or directly. GIMP itself just doesn't directly call GL, si...

What other applications have you checked with? Were they GL? Did you try the other applications with the same monitor/graphics card/drivers/OS you're using? I have reproduced this issue with other applications on my own (Linux) machine, but we've reproduced the problem on multiple Windows machines ...

Frame 0: backbuffer and frontbuffer are empty, nothing on screen Frame 1: backbuffer filled, front buffer empty, nothing on screen Frame 2: first time something is shown on screen - the things from 2 frames back This could make sense as an explanation. However, I don't know why the GPU wouldn't exe...

I am using Linux (Linux Mint 20.2, also nVidia graphics), and this is what I recorded. The delay was not 1 frame as I said, but 2-3 frames with VSync. And with vsync off, once again, it is still 2-3 frames, just that the frame time is much lower. The boxes were just meant as a demo of the issue; not...

First of all, thank you for taking your time to read this. I've been stuck on this for a while and would appreciate any help you can give. I have read related forum posts but noone appears to have done more thorough testing on this issue. Attached is a minimal example to reproduce the issue I am hav...