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LinUwUx documentation

Host LD_PRELOAD library that provides the userspace interpositions needed for software relying on a specific CPUID-faulting + signal protocol under GE-Proton and CachyOS Proton.

Start here

1. Prerequisites — host CPU / UMIP / cpuid_fault notes
2. Install
3. Common mistakes
4. Launching — then your launcher (Steam / Lutris / Heroic / Faugus / umu)
5. Gamescope
6. Environment variables
7. Troubleshooting

Protocol support (short)

One liblinuwux.so covers the modern and legacy layouts (auto-detected). Marker files used only for process identification (never loaded): reflex.dll, reflex64.dll, DenuvOwO.dll, DenuvOwO.ini.

Older packages that ship launcher.exe: launch the game .exe directly on Linux. See Launching and Common mistakes.

Host configuration (UMIP, CPUID faulting support, optional hypervisor) is outside the scope of this repository.