Everything was A-OK - now CTD as soon as I switch to VR

[TacomaSailor 191]

Reverb G2 / 3060 Ti Driver 31.0.15.2698 (latest Game Ready 526.98) / Win 10 21H2 19044.2251 / Steam

I had been using the G2 a lot prior to the latest MSFS update but today is first try with VR since SU 10.

VR works fine in Assetto Corsa.  VR works fine in MSFS as long as I run in VR desktop mode (I start the sim from the VR desktop) - I can do anything I want with no problems. 

When I start Mixed Reality then MSFS from the 2D desktop and then use the MSFS Options / VR / switch to VR I get an immediate CTD.

Empty Community folder and also happens in SAFE mode.  

I've used both MS Mixed Reality and Steam VR with same result.  Only odd thing is that when I start Steam VR and then start MSFS from the Steam Library - I get a Steam message that MSFS does not support VR.

What have I overlooked / forgotten about starting VR?  Two months ago it was so easy and worked perfectly!

[dogmanbird 269]

Hi, any chance you are running the OpenXR Toolkit? If so, is the in-game msfs2020 render resolution set to 100? I think used to crash if set otherwise though this may no longer be the case.

Otherwise, it may be worth uninstalling and reinstalling OpenXR and Open XR tools (different to Open XR Toolkit incase you are unaware)

and you could try checking for updates from the MS Store library

Edited November 22, 2022 by dogmanbird

[TacomaSailor 191]

If I set MSFS to use DX11 - VR works perfectly and I get a surprisingly good FPS using DLSS/Quality/Ultra

If I tell MSFS to use DX12 - CTD as soon as I hit CTRL+Tab or use the VR option to turn on VR

[Lange_666 167]

Easy, just keep it on DX11 and don't bother with DX12, DX12 isn't ready, too many (small) issues.

 

[Reset XPDR 1,372]

As @dogmanbirdsays above, earlier versions of OXRTK cause these CTDs switching to VR in DX12. Either turn OXRTK off or update it to the latest version.

Edited November 23, 2022 by Reset XPDR

[LouP 116]

What is OXRTK.  I'm having these crashed now.

LouP

[dogmanbird 269]

OXRTK = OpenXR Toolkit

It is different software to OpenXR Tools (required for WMR headsets like Reverb G2. This one is part of windows apps library)

I've been unable to use OXRTK since the latest MSFS update and the game now gives an error when entering VR unless I use OXRTK safe mode or disable it. I haven't had much time to figure out why. 

Edited December 14, 2023 by dogmanbird

[LouP 116]

OK, thanks.  I figured out the problem.  I simply undid the DLSS version upgrade that I performed a week or two ago and all is well again.  That mod was hailed as the secret to all our problems.  I should have known better.

LouP