(In reply to Alex Deucher from comment #2)
> Possibly the same issue as bug 106175.

Do you suspect the mouse cursor issue? That's not the case here: The gamma
adjustment stutter also occurs without vsync or any other fullscreen vsync
application running.

I will give a Wayland session a try this evening. Wouldn't be surprised if this
issue is completely unrelated to Xorg specific things.