Issue with CloudXR SDK and SteamVR

Gaming and Visualization Technologies XR – VR/AR/MR CloudXR (VR and AR Streaming)
1

Our goal is to publish a CloudXR app on AWS and on Azure . To do that we use the provided AMI on AWS and the image on Azure. We are following the provided documentation (.pdf) to install additional tools on Azure such as NVIDIA-CloudXR-SDK-1.1 .
We noticed that the CloudXR-SDK adds an Add-On to SteamVR.

As soon as we installed all required tools we created a specialized managed image on Azure to deploy it on multiple machines . We noticed that after the new image is deployed on a machine the CloudXRRemoteHMD Add-On disappears even if the sdk-files are still existing on the new machine.

2021-01-12_17h43_55
2021-01-12_17h43_551518×1530 225 KB

Please also note that we experience this issue only on Azure. AWS works fine.

  1. How can we persist the Add-On properly?
  2. How can we add the Add-On if it disappeared?
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2

For #2, you should use the vrpathreg utility that comes with SteamVR - you can find it at C:\Program Files (x86)\Steam\steamapps\common\SteamVR\bin\win64\vrpathreg.exe assuming you’re on an English Windows x64 SKU installed to the C drive. Invoke it as:
vrpathreg.exe adddriver "<CloudXR-install-dir>\VRDriver\CloudXRRemoteHMD" - be sure to properly quote the CloudXR path, as the default install path C:\Program Files\NVIDIA Corporation\CloudXR\ contains a space.

For #1, it looks like whatever vrpathreg is doing isn’t being persisted properly. Maybe use procmon and see what paths / registry keys it touched and make sure they’re saved / restored properly?

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