xrCreatePassthroughFB fails with -2 / Failure_NotInitialized over Link — all prerequisites verified
Passthrough over Link fails to initialize on my setup. Posting in case
anyone has seen this or knows what else to check.
■ Environment
Headset : Meta Quest 3S
PC runtime : 1.205.0 (205.0.0.167.543), LIVE channel
Connection : Wired Link (USB 3.2, USB Test passed at 2 Gbps+);
Air Link same result
Unreal : 5.3 / 5.6 (Oculus fork) / 5.7, Meta XR Plugin v65–v205
Unity : 6000.0.66, official Meta sample
Unity-MRUtilityKitSample-205.0.0
■ Errors
Unreal:
LogOculusXRPassthrough: Error: xrCreatePassthroughFB failed, error : -2
(-2 = XR_ERROR_RUNTIME_FAILURE)
Unity:
Failed to initialize Insight Passthrough. Please ensure that all
prerequisites for running Passthrough over Link are met ...
Error Failure_NotInitialized
OVRPlugin.GetInsightPassthroughInitializationState()
-> Failure_NotInitialized
Same result regardless of engine, engine version, plugin version,
rendering path (D3D12 / Vulkan Mobile Preview), or connection method.
■ Already tried
- All Link app Developer tab toggles ON (Developer Runtime Features,
Passthrough over Link, Spatial Data, etc.)
- Registry values including PassthroughOverLink all set to 1
→ the .reg fix from the thread below does NOT apply, mine are
already 1
- Developer account signed in on both PC app and headset
- OpenXR Runtime set to Meta Horizon Link as active
- Editor restarted after toggling
- Checked the Link service log via OculusDebugTool: the service reads
PassthroughOverLink: uint32: 1 (0x1) correctly, but there is no line
anywhere recording a passthrough init attempt or failure
■ Related threads (both unresolved)
https://communityforums.atmeta.com/discussions/Questions_Discussions/failed-to-initialize-insight-passthrough/1367576
https://communityforums.atmeta.com/discussions/PairingConnection/passthrough-over-link-not-available/1357035
Has anyone hit this and found what the actual blocker is? Any pointers
on what else to check would be appreciated.