Proton-CachyOS, a Proton fork maintained by CachyOS with extra patches and performance tweaks, has been released in version 11.0-20260702. The tool acts as a compatibility layer that runs Windows games under Linux through Steam and Lutris.

The release is based on Proton Experimental 11.0-20260701b and introduces a new Pipewire audio driver (winepipewire.drv), enabled by default, removing the need to route audio through PulseAudio. It also integrates FSR4 4.1.1 for all supported GPUs and simplifies the related environment variables.

• Proton (SLR and Native)
  • Updated to Proton Experimental 11.0-20260701b
  • Added winepipewire.drv driver for Wine to directly use Pipewire instead of using winepulse.drv and going through pipewire-pulse.
    • The driver is enabled by default. To disable it and use winepulse.drv set PROTON_USE_PIPEWIRE=0.
    • You can also use WINE_AUDIO_DRIVER to set the list of drivers for wine to choose from. The default list is pipewire,pulse,alsa.
  • Imported amdxc64 changes from Proton-EM to enable FSR4 4.1.1 on all supported hardware.
    • The amdxcffx64.dll driver dll is copied automatically, there is no need to use PROTON_FSR4_UPGRADE any more.
    • Removed PROTON_FSR4_RDNA3_UPGRADE and PROTON_FSR3_UPGRADE (renamed to PROTON_FFX3_UPGRADE).
  • Added the DualSense 5 patches that were skipped previously due to the rebase to Proton 11.0.
  • Added some stubs to dnsapi which should allow iRacing to run. The anti-cheat blocks the game from fully working.
  • Fixed Surviving Mars crashing after loading into the start menu along with some other audio-related issues.
  • Fixed compile-time configuration for GStreamer, specifically enabled glib-checks again.
  • Updated d7vk to version v1.12.
  • Improved the Vulkan version detection and the underlying API to also check for driver versions and extensions in the future.
  • Added PROTON_ADD_CONFIG environment variable to supply configuration through compatibility configs instead of environment variables.
  • Enabled the compiler item in DXVK_HUD by default.
• Proton (SLR specific) / Proton (Native specific) / Wine (Standalone): None

Source: GitHub