protonscr

(Proton Experimental) Broken FSR 4 support on RDNA 4

protonclosed
ValveSoftware/Proton#9696 · opened 2026-04-21 by dm-zharov · updated 2026-04-21 · 1 comments · github
Ddm-zharov 2026-04-21 github

Hi,

After the recent update to Proton Experimental (which appears to have been rebased from Proton 10 to Proton 11), FSR 4 can no longer be activated on supported AMD hardware.

I was successfully running FSR 4.1.0 on my RX 9070 XT using the FSR4_UPGRADE=1 option and placing amdxcffx64.dll in steamapps/compatdata/*/pfx/drive_c/windows/system32 with Valve’s Proton build, and it worked flawlessly.

As I understand it, the breakage is due to a missing commit in the recent wine proton_11.0 branch: https://github.com/ValveSoftware/wine/issues/322

Would it be possible to reintroduce this change? Thanks a lot!

Kkisak-valve maintainer 2026-04-21 github

Hello @dm-zharov, please do not intentionally post duplicate issue reports. There's no value in fragmenting the discussion of an issue across multiple issue trackers.

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