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@xzn xzn commented Jan 6, 2026

From issue ValveSoftware/Proton#580 (comment)

Upstream wine bug: N/A. sharedgpures.sys and SharedGpuResource is Valve's wine only.

Summary:

PROCESS_ALL_ACCESS is not needed to duplicate handles for the purpose of sharing gpu resources. Requesting it causes OptiScaler's dx11ondx12 to fail on FFXIV (where PROCESS_VM_WRITE is not allowed). Quick tests with OptiScaler in various games seem ok with this change.

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