Coelacanthus

He may want to say “fastsync” (whose kernel part called winesync). It’s the predecessor of NTsync and was renamed to NTsync when merged into linux mainline.

Before NTsync was merged, those distrobutions provides the kernel packages with winesync patches. Since linux 6.12, NTsync was merged so they droped winesync from kernel package. But NTsync’s API is different with fastsync/winesync, so old wine with fastsync support will stop working with new kernel. (While NTsync still isn’t merged to wine)

FYI, nvidia driver will remove shader cache that bigger than 1024MB. That make the game run without shader cache and has poor performance. Set environment variable __GL_SHADER_DISK_CACHE_SKIP_CLEANUP=1 to prevent this behavior.

https://github.com/HansKristian-Work/vkd3d-proton/issues/2506

Tips: Don’t forget to search in issues of dxvk and vkd3d-proton when you meet game performance issue.

dxvk-nvapi said it can works on Mesa NVK. But I don’t know whether DLSS feature works.
https://github.com/jp7677/dxvk-nvapi/#requirements