DCS Steam will not load into VR

[dwaldrop]

Running an Intel 149000KF with 64GB RAM, 4080 Super OC, and Pimax Crystal Light.  All NVIDIA and Pimax drivers are up to date.
I had a Radeon 7900XTX in the same system and everything worked great.  Removed the AMD drivers with  DDU and put the 4080 in.  Installed and updated all NVIDIA drivers.  Now DCS will not launch into VR.  
Pimax OpenXR and Pimax Play are both set to use Pimax OpenXR.  When I open DCS in Steam and click Use Open XR it tries to go into VR.  The box in the taskbar is black, then at the same time the NVIDIA screen pops up, the DCS box turns yellow and it opens in 2D.  
 

I’ve verified file integrity and then uninstalled and reinstalled DCS along with all of the other software.  Nada.  Maybe it’s something with NVIDIA?

Any help or insights would be appreciated. 

[MAXsenna]

Post you're dcs.log and someone will probably take a look.
Cheers!

Sent from my SM-A536B using Tapatalk

[DCoffey]

Check if vr works in another app

[dwaldrop]

DCS.LOG attached.

Skyrim VR and Fallout 4 VR work

The log file reflects the following settings:

Pimax Play - OpenXR Runtime is Pimax OpenXR 

PimaxXR Runtime is active

Quadviews is active

SteamVR is not installed (never has been installed)

I had an XR 7900XTX with all of the drivers updated and DCS ran like a champ in VR.  Launched Win11Pro in safe mode and ran DDU to remove all AMD drivers.

Installed the 4080 and loaded latest NVIDIA drivers along with NVIDIA app

DCS now will not run in VR

Another anomaly is now when I open PIMAX XR Control Center I get the following popup messages:

Failed to Query Version

Failed to locate SteamVR.  Switching to the SteamVR runtime will not be offered.

Unable to identify the active OpenXR runtime: C:\Program Files\Pimax\Runtime\PiOpenXR_64.json

 

After I acknowledge those three messages PimaxXR Runtime opens and I am able to select PimaxVR as the active runtime.  If I close it, I go through the same process again.

 

Nothing has changed except the removal of the AMD GPU with drivers and the installation of the NVIDIA GPU and drivers.

dcs.log

[sleighzy]

4 hours ago, dwaldrop said:

DCS.LOG attached.

Skyrim VR and Fallout 4 VR work

The log file reflects the following settings:

Pimax Play - OpenXR Runtime is Pimax OpenXR 

PimaxXR Runtime is active

Quadviews is active

SteamVR is not installed (never has been installed)

I had an XR 7900XTX with all of the drivers updated and DCS ran like a champ in VR.  Launched Win11Pro in safe mode and ran DDU to remove all AMD drivers.

Installed the 4080 and loaded latest NVIDIA drivers along with NVIDIA app

DCS now will not run in VR

Another anomaly is now when I open PIMAX XR Control Center I get the following popup messages:

Failed to Query Version

Failed to locate SteamVR.  Switching to the SteamVR runtime will not be offered.

Unable to identify the active OpenXR runtime: C:\Program Files\Pimax\Runtime\PiOpenXR_64.json

 

After I acknowledge those three messages PimaxXR Runtime opens and I am able to select PimaxVR as the active runtime.  If I close it, I go through the same process again.

 

Nothing has changed except the removal of the AMD GPU with drivers and the installation of the NVIDIA GPU and drivers.

dcs.log 43.06 kB · 1 download

You can only have one runtime set to be the default OpenXR runtime. It sounds like you have Mbucchia's PimaxXR installed as well as the PimaxPlay one. This is fine, however, go into Mbucchias' PimaxXR app and check to see if you have the SteamVR option selected in there. This may be why it is attempting to use that runtime (which doesn't exist as you aren't using SteamVR). Change that to instead be PimaxXR and restart your PC.

That same error is in your dcs.log file so it's definitely trying to use a non-existent runtime:

2025-02-15 16:17:02.603 ERROR   VISUALIZER (Main): OpenXR failure XrResult failure [XR_ERROR_RUNTIME_UNAVAILABLE]
    Origin: xrEnumerateInstanceExtensionProperties(nullptr, 0, &instanceExtensionCount, nullptr)
    Source: Projects\Visualizer\Source\OpenXR\openxr_program.cpp:225

null

Edited February 15 by sleighzy

[sleighzy]

This tool may also help identify which runtime it's attempting to use.

https://github.com/rpavlik/xr-picker

I don't use the Steam version of the game, but from within Steam can you try just using one of the other options to run the game, i.e. not one that mentions OpenXR. DCS is OpenXR by default so no need to select a specific OpenXR option in Steam. It may be trying to force it to use the SteamVR runtime with that option, which is not installed.

[dwaldrop]

sleighzy, thank you for the input.  I did another DDU wipe in safe mode and started over.  This time I installed Steam VR (don't use it) and Pimax Play pickled it right up.  I had looked through the DCS log too and saw the runtime errors but just hadn't put two and two together.  Thanks again for the assist!