CS:GO stuttering after playing for a while

[slonkazoid]

Your system information

• System information from steam (Steam -> Help -> System Information) in a gist:
• Have you checked for system updates?: Yes
• Launch options: MANGOHUD=1 OBS_VKCAPTURE=1 gamemoderun %command% -vulkan -novid -nohltv -precachefontchars -noquicktime -precachefontchars
• Tested with dxvk v2.3 and v2.2
• Shader pre-caching is disabled

Please describe your issue in as much detail as possible:

CS:GO halves FPS starts stuttering in fixed intervals, and coredumps after just playing for a while. I'll attach footage of this happening if I catch it while recording. I can also send parts from the coredump if any Valve employees want to see it. Does not go away unless you restart the whole game.

Does not happen (or I have not yet come across) on any other games that I use dxvk v2.2+, mangohud, obs-vkcapture and/or gamemoded with.

Steps for reproducing this issue:

1. play for a while (30-90m)

[slonkazoid]

Seems to be the old libx11 bug. I somehow upgraded from 1.8.3 to 1.8.6 without checking.

[kisak-valve]

Hello @slonkazoid, this issue is already being tracked at #2901. Closing as a duplicate.