> Monado is an open source XR runtime delivering immersive experiences such as VR and AR on mobile, PC/desktop, and other devices. Monado aims to be a complete and conformant implementation of the OpenXR API made by Khronos. The project is currently being developed for GNU/Linux and aims to support other operating systems such as Windows in the near future.
Essentially, Monado is an open source OpenXR implementation, it can be used as an alternative to SteamVR.
Monado should always be utilized with the enviornment variable `XRT_COMPOSITOR_COMPUTE=1` to avoid stuttering when application is below maximum refresh rate of the HMD.
Check your logs and ensure that the keywords REALTIME and COMPUTE vulkan queue has been created as opposed to MEDIUM and GRAPHICS queue types before opening issues about failing reprojection.
If your monado-service is unable to acquire these properties in the debug logs `sudo setcap 'cap_sys_nice=eip' <monado-service-binary>` to ensure it can request the priority it needs.
Monado's space may be modified with the enviornment variables OXR_TRACKING_ORIGIN_OFFSET_X=0.0, OXR_TRACKING_ORIGIN_OFFSET_Y=1.0, OXR_TRACKING_ORIGIN_OFFSET_Z=0.0 to force a defined space or origin offset throughout the session. Useful for seated mode configurations, offset units are floating point in meters, positive or negative.
To use Monado as the OpenXR runtime with Steam, or if you're planning to use the SteamVR lighhouse driver in Monado, make sure to [run the room setup first](/docs/steamvr/).
| AMD | RADV (Open Source) | Excellent | Yes | Robust (RDNA and up) | Functional | RDNA generation and up supported with compute tunneling for reprojection. Lower than RDNA are not robust. |
**Notes:**
- **Vulkan Support**: Indicates the level of Vulkan API stability.
- **DisplayPort Audio**: Whether audio over DisplayPort is supported.
- **Reprojection Support**: Describes the support and quality of reprojection features for VR. Poor support indicates that the driver is not able to properly handle Vulkan realtime shaders and it will present as visual stutter. Non-robust solutions will suffer stutter under very high GPU load.
- **PRIME/ Hybrid GPU Support**: Compatibility with systems using multiple GPUs simultaneously. Monado and all clients must be run on a single select GPU due to memory tiling requirements.
- Audio over displayport is known to temporarily cut out when new audio sources spring up on pipewire [without a fix to add alsa headroom](https://wiki.archlinux.org/title/PipeWire#Audio_cutting_out_when_multiple_streams_start_playing)
