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Arc Pro B60 on WSL2 (Vulkan via Mesa Dozen) is 8 to 40 times slower than native Windows Vulkan, and Qwen3.8-27B segfaults inside Intel's LLVM. Anyone seen this?

Testing an Intel Arc Pro B60 (24 GB). Same card, same Intel driver, same llama.cpp build (b11889), same GGUF files. The only change is where I run it: WSL2 with Mesa Dozen, or the official native Windows Vulkan binary of the same tag (launched from WSL2 through interop). Model WSL2 + Dozen pp / tg…

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  1. 2026-10-30 10:54 · r/LocalLLM
    Arc Pro B60 on WSL2 (Vulkan via Mesa Dozen) is 8 to 40 times slower than native Windows Vulkan, and Qwen3.8-27B segfaults inside Intel's LLVM. Anyone seen this?

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