CS2: Severe stutter with Wayland (vkWaitForFences VK_TIMEOUT)

[an0nfunc]

Your system information

• System information from steam
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

Stutter under Wayland (sway) + AMDGPU. This does not happen with X11 (i3).

As soon as the game runs a few seconds, there are severe stutters down to 1 fps every few seconds. Seems to be getting more frequent if the game runs for a while.

Log messages that seem to relate to this issue:

CSwapChainBase::QueuePresentAndWait() looped for 21 iterations without a present event.
[RenderSystem] FrameSync() - bailing out of vkWaitForFences( fenceCount = 1 ) after 0.255553 seconds, error = VK_TIMEOUT
CSwapChainBase::QueuePresentAndWait() looped for 22 iterations without a present event.
[RenderSystem] FrameSync() - bailing out of vkWaitForFences( fenceCount = 2 ) after 0.252701 seconds, error = VK_TIMEOUT
CSwapChainBase::QueuePresentAndWait() looped for 21 iterations without a present event.
[RenderSystem] FrameSync() - bailing out of vkWaitForFences( fenceCount = 1 ) after 0.252569 seconds, error = VK_TIMEOUT
CSwapChainBase::QueuePresentAndWait() looped for 22 iterations without a present event.
[RenderSystem] FrameSync() - bailing out of vkWaitForFences( fenceCount = 2 ) after 0.252716 seconds, error = VK_TIMEOUT
CSwapChainBase::QueuePresentAndWait() looped for 21 iterations without a present event.
[RenderSystem] FrameSync() - bailing out of vkWaitForFences( fenceCount = 1 ) after 0.255026 seconds, error = VK_TIMEOUT
CSwapChainBase::QueuePresentAndWait() looped for 22 iterations without a present event.
[RenderSystem] FrameSync() - bailing out of vkWaitForFences( fenceCount = 2 ) after 0.257787 seconds, error = VK_TIMEOUT
CSwapChainBase::QueuePresentAndWait() looped for 21 iterations without a present event.
[RenderSystem] FrameSync() - bailing out of vkWaitForFences( fenceCount = 1 ) after 0.256348 seconds, error = VK_TIMEOUT
CSwapChainBase::QueuePresentAndWait() looped for 22 iterations without a present event.
[RenderSystem] FrameSync() - bailing out of vkWaitForFences( fenceCount = 2 ) after 0.251057 seconds, error = VK_TIMEOUT

Steps for reproducing this issue:

1. Run CS2 under Wayland + AMD GPU