protonscr

Performance regression for every unity engine games with AMD graphics.

protonclosed
ValveSoftware/Proton#8862 · opened 2025-06-28 by tails101 · updated 2025-06-28 · 0 comments · github
Ttails101 2025-06-28 github

System Information

  • GPU: rx5700xt (Navi 10)
  • Video driver version: current radv (mesa 25.1.4)
  • Kernel version: bazzite current (6.15.3)

I confirm:

  • [x] that I haven't found an existing compatibility report for this game.
  • [x] that I have checked whether there are updates for my system available.

Symptoms

One issue has been found here

https://community.amd.com/t5/pc-drivers-software/issues-with-amd-and-unity-games/td-p/661406

And

https://www.reddit.com/r/VRchat/comments/1lj3aw1/for_amd_users_run_vrchat_in_win8_compatibility/

In short, unity games need windows8 compatibility mode to run at expected frame rates on windows 10 and 11 with a AMD graphic card.
After testing in current bazzite, this issue affect wine as well.
I measured sometime 50% lower frame rate than expected in vrchat and other unity games with a AMD graphic card.

Reproduction

Running vrchat in wine directly show the issue
Running it in lutris with windows 8 compatibility mode fix the issue and performance are the one expected.

This affect games like hollow knight or the binding of Isaac or don't starve.

Nothing extracted yet.