2022.3 LTS VR Project crashing when runtime is stopped

Unity Engine
1

I am using OpenXR and meta quest 3. The unity editor version does not seem to matter as it crashes on a 2023 one as well. I am simply in the VR template and whenever I press play again to stop the runtime, Unity crashes.

more information:
fresh project. fresh install of Unity. Streaming to quest using quest link app

2

Editor.log?

3

9851283–1418322–Editor.txt (118 KB)

1 Like
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    Managed Stacktrace:
=================================================================
      at <unknown> <0xffffffff>
      at UnityEngine.XR.OpenXR.OpenXRLoaderBase:Internal_DestroySession <0x00086>
      at UnityEngine.XR.OpenXR.OpenXRLoaderBase:smile:einitialize <0x0018a>
      at UnityEngine.XR.Management.XRManagerSettings:smile:einitializeLoader <0x00077>
      at UnityEngine.XR.Management.XRGeneralSettings:smile:eInitXRSDK <0x0006a>
      at UnityEngine.XR.Management.XRGeneralSettings:Quit <0x00042>
      at UnityEngine.XR.Management.XRGeneralSettings:InternalPlayModeStateChanged <0x0002a>
      at UnityEditor.XR.Management.XRGeneralSettingsPerBuildTarget:PlayModeStateChanged <0x000d2>
      at UnityEditor.EditorApplication:Internal_PlayModeStateChanged <0x000aa>

Not much to go on except what you said. It’s definitely crashing when ending the OpenXR session.

I wonder if perhaps you need to update the Quest SDK, or even the opposite in case there was a new Quest SDK update that for whatever reason isn’t compatible with Unity’s XR package(s).

5

thanks for looking. Yeah, its when you end the openxr session. Every package seems up to date - there are no options to update the packages and its what came with the install.

I do think there is a lot of overlap and incompatability between quest sdks - supposedly you are supposed to use their Meta all in one SKD but on the asset store it has 2 stars and people say it is bug riddled.

OpenXR should be the best option really.

Also, if I quit unity through the headset, it doesn’t seem to crash unity on the PC…

It being a quest 3, you need Unity 2022 LTS minimum to run, which is what I am using, but as I said I tried on 2023 as well and it was the same problems.

Also also, even if I have no headset connected, if I want to just observe the scene through the editor, if I press play the SECOND time it always crashes - disabling the ‘enable XR interaction on startup’ option seemed to fix this.

Summay: really strange OpenXR problem I guess?

6

For sure an issue that needs tinkering with and reach out to other Quest devs on their forums.
If you have the option to downgrade Quest SDK or whatever installs are necessary to make the quest work with Unity I would try that. I’ve had incompatibilities with the first two Quests with Unity based on what SDK was installed. Same with practically any external XR device actually, there’s always something.

Unity naturally lags behind making updates on their end so you’re sometimes forced to use a lower SDK version than the device offers, unless the device vendor is serious about keeping Unity compatibility. This sort of thing isn’t always documented though.

7

We’re having kind of the same problem that unity is crashing randomly around every third time when exiting the play mode.

stacktrace looks the same:

Managed Stacktrace:
=================================================================
      at <unknown> <0xffffffff>
      at UnityEngine.XR.OpenXR.OpenXRLoaderBase:Internal_DestroySession <0x00086>
      at UnityEngine.XR.OpenXR.OpenXRLoaderBase:smile:einitialize <0x0018a>
      at UnityEngine.XR.Management.XRManagerSettings:smile:einitializeLoader <0x00077>
at (...)

the problem only occurs though when the VIVE Streaming Hub is installed on the pc. when we deinstall this programm the crashes disappear as well.
new project with untiy VR template has same problems and we tested with unity 2021.3.31f1 LTS and with 2022.3.30f1 LTS.

8

interesting… I have VIVE streaming hub installed as well for when I need to use those headsets. That must be the problem then. Not sure why though, but that suggests OpenXR installs conflicting somewhere? Or runtimes? My meta quest link desktop app just uses meta quest link as the runtime, not steam or openxr or anything

ALSO: a potential fix that seems to work for me is quitting unity in the headset rather than pressing the play button on Unity. This doesn’t seem to crash it

9

So we got some feedback from Vive and perhaps this could fix your crashes as well:
Go to SteamVR>Settings>OpenXR>Manage OpenXR API Layers
There you can try to turn everything off, or in our case the crashes disappeared when “VIVE OpenXR MR” is turned off.

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10

Hello all,
Double-check the version of the XR Unity packages you are using
What was listed as “up-to-date” in my case was not
e.g. the package manager was listing OpenXR Plugin 1.7.0 as the most recent when in fact it is the 1.11.0 (OpenXR Plugin | OpenXR Plugin | 1.11.1-exp.1)
Upgrading seems to have resolved the issue described in this thread for me

11

Sorry for waking up the thread but this solution seems to work in my case
I had to some duplication in it but no idea why (but as far as it work, I won’t change anything else):

image
image796×624 32.9 KB

Just for future proof:

  • OpenXR Plugin : 1.9.1
  • SteamVR : 2.8.8
  • Unity : 2022.3.16f1
  • Use Vive Pro, Vive Tracker 3

Thanks for the info! :slight_smile:

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