XeSS XMX Linux, a toolkit for Linux and Proton, has been released in version 20261111.

It lets Intel Arc GPUs (Xe-HPG, Xe2, Xe3) run XeSS upscaling on their matrix hardware (XMX) instead of the slower DP4a fallback, using a patched Mesa Vulkan driver and a compatibility layer.

Highlights include the final Mesa 26.3.0, a new default driver for Xe3 (Panther Lake), and experimental XeSS support for D3D11 and Vulkan games.

• Mesa 26.3.0: Both 26.3 driver builds move to the final 26.3.0 release. The Jay crash-fix patch (0004) is dropped because Mesa 26.3 now handles those games’ compilation itself.
• Xe3 default driver: On Xe3 (Panther Lake) GPUs, the install script now uses the unpatched Mesa 26.3.0 with the project’s Vulkan layer. Xe-HPG and Xe2 GPUs stay on the patched driver. The XMX_DRIVER environment variable can override this with patched, stock, or auto.
• XeSS in D3D11 games (experimental): Setting XESS=latest also enables XeSS for D3D11 games by routing them through the D3D12 XeSS path, so they can use XMX. Tested only with sample software, not a real game.
• XeSS in Vulkan games (experimental, Xe3 only): Setting XESS=latest also covers Vulkan games, with XESS_VK=1 or XESS_VK=0 to force it on or off. On Xe-HPG and Xe2, Vulkan games keep using DP4a. Also tested only with sample software.
• Uninstall: uninstall.sh now also removes the layer’s session variables.
• Distribution: The archive contains no Intel or AMD binaries. install.sh downloads Intel’s XeSS SDK and AMD’s FidelityFX files.

Source: GitHub