I’m running into a reproducible issue with Forza Horizon 5 on Bazzite. The game reaches “Optimizing for your PC” and then immediately closes. Proton logs show repeated c000001d EXCEPTIONILLEGALINSTRUCTION errors during the DX12 pipeline setup.the same hardware runs FH5 fine on Windows 11. I tested the exact same Steam install on Arch Linux and the game launches normally there, so it looks like the crash is specific to Bazzite’s Intel Vulkan/Mesa stack. If you need logs, I can provide the full Proton trace. Just wanted to report this in case it’s a driver or Mesa version issue on Bazzite.