Arch Linux

2.0.33

Member

Registered: 2025-09-16

Posts: 30

OpenXR-LOADER cannot find existing libopenxr_monado.so

Hi gents,

I am trying to run my favorite aviation sim, Digital Combat Simulator (DCS), in VR under Arch. After a lot of tinkering I have
- DCS working in 2D, under Lutris, with a GE-Proton10-10
- my HP Reverb G2 VR headset working with monado. I can run the xrgears and hello_xr demo programs and see the blocks and train station in my headset

Getting DCS to use OpenXR is more difficult and I am stuck with a peculiar issue. My wine/lutris log says the following:

Error [GENERAL | xrEnumerateInstanceExtensionProperties | OpenXR-Loader] : RuntimeInterface::LoadRuntime skipping manifest file /home/auser/.config/openxr/1/active_runtime.json, failed to load with message "/usr/lib/libopenxr_monado.so: cannot open shared object file: No such file or directory"
Error [GENERAL | xrEnumerateInstanceExtensionProperties | OpenXR-Loader] : RuntimeInterface::LoadRuntimes - failed to load a runtime
Error [GENERAL | xrEnumerateInstanceExtensionProperties | OpenXR-Loader] : Failed to find default runtime with RuntimeInterface::LoadRuntime()
Error [GENERAL | xrEnumerateInstanceExtensionProperties | OpenXR-Loader] : Failed querying extension properties

which is odd, because

[auser@peasant ~]$ cat ~/.config/openxr/1/active_runtime.json 
{
    "file_format_version": "1.0.0",
    "runtime": {
        "name": "Monado",
        "library_path": "/usr/lib/libopenxr_monado.so",
        "MND_libmonado_path": "/usr/lib/libmonado.so"
    }
}

[auser@peasant ~]$ file -L /usr/lib/libopenxr_monado.so
/usr/lib/libopenxr_monado.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=89d4b0d61be7c5fac11394d3ea6f6a63e10fe566, stripped

[auser@peasant ~]$ ls -lL /usr/lib/libopenxr_monado.so
-rwxr-xr-x 1 root root 826008 Oct 16 21:08 /usr/lib/libopenxr_monado.so

So why can openxr not find this file?