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lvra.gitlab.io/content/docs/fossvr/wmr_lighthouse_hacky.md
Zuzka Varga 12041e65ee Improve WMR lighthouse hacky (!70)
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WMR Lighthouse (no SteamVR) 9000

WMR Lighthouse (no SteamVR)

This describes a WMR Lighthouse setup using the steamvr_lh driver.

It's different from WMR Lighthouse

This doesn't use steamvr to re-map the head from some lighthouse tracking device. Instead it does this natively in monado, so SteamVR is only necessary for the proprietary steamvr_lh driver.

For now this is a hacky approach as Monado's builders don't support the functionality yet:

This is made for WMR based headsets and has been tested with a Reverb G2 & Vive1 (Vive1 used only for it's 2 watchman dongles needed for the lighthouse controllers).

You can easily adapt this for other headsets in a hacky way, until these issues are closed.

Tested working on Arch Linux with NVIDIA RTX 2060S.

Setup:

Setup your lighthouse system on SteamVR Windows. The Linux SteamVR version does not work well. On windows: Update everything, pair everything & setup your room boundaries.

Linux setup:

  • install Steam
  • Download SteamVR on Steam (try non beta version first)
  • Configurations from Windows copied over

How to copy your Windows steam configurations to Linux

  • mount your windows drive (e.g. at /mnt)
  • cp -r "/mnt/Program Files (x86)/Steam/config" ~/.steam/steam/

Linux only setup

It may be possible to use SteamVR on Linux to setup your room boundries, pair and update everything. This is untested, but try at least. You may need playspace moving via Wlx to fine tune the floor if you don't have a Windows install.

Build

Manually

Use this fork of Monado

git clone https://gitlab.freedesktop.org/Zuzka/monado

(if it's too old, try to merge upstream into it and fix it)

Ensure you have all required dependencies installed beforehand (Envision or Monado docs might help)

cmake -G Ninja -B build -DCMAKE_INSTALL_PREFIX=/usr -DXRT_BUILD_DRIVER_SURVIVE=0 -DXRT_BUILD_DRIVER_VIVE=0 -DXRT_BUILD_DRIVER_STEAMVR_LIGHTHOUSE=1

sudo ninja -C build install

Envision

WiVRn version: 0.19+

Use this fork of Monado: https://gitlab.freedesktop.org/Zuzka/monado

In Envision, set Profile as such:

XR Service CMake Flags:

XRT_BUILD_DRIVER_SURVIVE=0
XRT_BUILD_DRIVER_VIVE=0
XRT_BUILD_DRIVER_STEAMVR_LIGHTHOUSE=1

Environment Variables:

LH_DEVICE_SERIAL="{YourSerial}"

Perform a Clean Build after changing the CMake flags!

USAGE:

  • set following environment variables in your e.g. bash_profile:
  • export LH_DEVICE_SERIAL="{YourSerial}"
  • get the actual tracking device serial via motoc monitor or by another way.

USEFUL RESOURCES: