https://bugs.freedesktop.org/show_bug.cgi?id=110659

--- Comment #85 from tempel.julian@gmail.com --- Thanks for the new Proton release including your fix (didn't realize you are the release manager :) ). As far as I can judge until now, the result is good enough in practice. There is this this reproducible spike, but moving the camera while in game seems free of stutter (a bit hard to judge, since the game is very stuttery in general).

It's definitely not the only case where atomic modesetting is hypersensitive, I wouldn't be surprised if it required some kind of rather comprehensive restructuring to make it more resilient in general. E.g. there is still this aforementioned problem with gamma adjustments: https://bugs.freedesktop.org/show_bug.cgi?id=108917

And there is also weak stutter each time when other windows on Xorg receive focus.

All those issues where non-existent with old legacy DC (amdgpu.dc=0 on Polaris and older). Intel probably is affected the same.