I recently baught a Valve Index, which is one of the few HMDs supported by Monado. When I first read I should install Steam, I decided to install Lutris instead. It works althoug it is not showing information about my CPU:
[System]
OS: Debian GNU/Linux 11 bullseye
Arch: None
Kernel: 5.17.6-gnu
Desktop: XFCE
Display Server: x11
[CPU]
Vendor: Vendor unavailable
Model: Model unavailable
Physical cores: Physical cores unavailable
Logical cores: Logical cores unavailable
[Memory]
RAM: 79.4 GB
Swap: 0.0 GB
[Graphics]
Vendor: Mesa/X.org
OpenGL Renderer: llvmpipe (LLVM 11.0.1, 128 bits)
OpenGL Version: 3.1 Mesa 20.3.5
OpenGL Core: 4.5 (Core Profile) Mesa 20.3.5
OpenGL ES: OpenGL ES 3.2 Mesa 20.3.5
Vulkan: Supported
Now I plan to extend to Lutris to support Godot VR Games. This is a great replacement for the Steam home.