IT'S OUT! Woot!

Will it automatically replace the current one on my system?

I don't want to manually install it if I don't have to, as it won't be automatically updated later on if I do. But you can use ProtonUp-Qt to install it.

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Proton (SLR and Native)

Updated to the most recent Proton Experimental release 11.0-20260428

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##Acknowledgments First of all, I would like to thank @Etaash-mathamsetty of Proton-EM and @NelloKudo of DWProton for their immense contribution to the project in general and for helping with the rebase on top of Proton 11 in particular.

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##Core Changes & Configuration

• ntsync Integration: The PROTON_USE_NTSYNC environment variable and related configuration have been removed. This is now the default (matching Valve's Proton 11). > Note: If needed, ntsync can still be disabled using PROTON_NO_NTSYNC.
• Wayland & HDR: Imported winewayland.drv updates from Proton-EM 11.
  • Important: Proton-CachyOS does not enable HDR by default to avoid enforcing a requirement for Nvidia 595 drivers. Use PROTON_ENABLE_HDR=1 to enable it manually.
• SteamRT4 Migration: Proton 11 uses SteamRT4, which lacks some libraries found in SteamRT3. Consequently, some media plugins in gstreamer and ffmpeg have been disabled.
  • Feedback Requested: Please report any missing media in games compared to Proton-CachyOS 10.

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##Patches and Fixes

• Wine-Staging: Almost all wine-staging patches from version 10 have been removed. We are keeping patches to a minimum, adding them selectively only when strictly required to fix specific issues.
• DualSense: These patches have been removed pending a rebase onto Proton 11. They may be added back in future versions if necessary.
• Asseto Corsa: The specific AC patch was removed. The game's HUD functions correctly using CSP 0.3, and the previous patch was suboptimal.
• Audio Fix: Resolved an issue where PROTON_GST_VIDEO_ORIENTATION was interfering with audio playback.

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Architecture & Build Changes

• x86_64_v4 Removal: The x86_64_v4 package is no longer provided as it offered no substantial performance gains and freed up build workflow resources.
  • Recommendation: Users should switch to x86_64_v3 or the standard x86_64 builds.

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Proton (SLR specific)

• None

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Proton (Native specific)

• Pure wow64: The native Arch package is now pure wow64.
• Rationale: This change addresses the removal of lib32-* packages from Arch and reduces reliance on the AUR.
• Best Practice: For maximum compatibility, we continue to recommend using the Steam Linux Runtime (-slr) package.

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Wine (Standalone)

• None