Linux experiment openXR

[Punzo]

Headset: Meta Quest 3
OS: Ubuntu 26.04

1. Setup wivrn server on linux:

flatpak install flathub io.github.wivrn.wivrn
sudo systemctl enable --now avahi-daemon
flatpak run io.github.wivrn.wivrn

2. Install wivrn client on meta store on Meta Quest 3
3. Pair client and server following instructions on wivrn UI.
4. Verify OpenXR
   cat ~/.config/openxr/1/active_runtime.json
   hello_xr -G Vulkan

this works!

On the other hand, I did not managed to use SlicerVirtualReality @lassoan
A) binaries from Slicer-5.13.0-2026-06-29-linux-amd64 have this library link error:

Error(s):
    Cannot load library /home/davide/Downloads/Slicer-5.13.0-2026-06-29-linux-amd64/slicer.org/Extensions-34829/SlicerVirtualReality/lib/Slicer-5.13/qt-loadable-modules/libqSlicerVirtualRealityModule.so: (/work/Preview/S-0-E-b/SlicerVirtualReality-build/OpenVR/bin/linux64/libopenvr_api.so: cannot open shared object file: No such file or directory)

workaround:

sudo mkdir -p /work/Preview/S-0-E-b/SlicerVirtualReality-build/OpenVR/bin/linux64
sudo ln -sf \
  /home/davide/Downloads/Slicer-5.13.0-2026-06-29-linux-amd64/slicer.org/Extensions-34829/SlicerVirtualReality/lib/Slicer-5.13/libopenvr_api.so \
  /work/Preview/S-0-E-b/SlicerVirtualReality-build/OpenVR/bin/linux64/libopenvr_api.so

B) once (A) is fixed, I clicked the virtual reality button (top left in the image below)

-> Slicer crash:

Switch to module:  "Markups"
Switch to module:  "VirtualReality"
Initializing "OpenXR" XR backend (1/1)
Optional extensions UnboundedRefSpace is supported
Optional extensions HandTracking is supported
LOG in xrCreateInstance: Instance created
	createInfo->applicationInfo.applicationName: OpenXR with VTK
Runtime Name: WiVRn 'v26.6.1'Runtime Version: 26.6.1
	createInfo->applicationInfo.applicationVersion: 1
	createInfo->applicationInfo.engineName: 
	createInfo->applicationInfo.engineVersion: 1
	createInfo->applicationInfo.apiVersion: 1.0.60
	appinfo.detected.engine.name: (null)
	appinfo.detected.engine.version: 0.0.0
	quirks.disable_vulkan_format_depth: false
	quirks.disable_vulkan_format_depth_stencil: false
	quirks.no_validation_error_in_create_ref_space: true
	quirks.skip_end_session: false
	quirks.parallel_views: false
	quirks.no_texture_source_alpha: false
	quirks.ignore_invalid_swapchain_usage_bits: false

LOG in xrGetSystem: Selected devices
	Head: 'WiVRn HMD'
	Eyes: '<none>'
	Left: 'WiVRn left hand interaction'
	Right: 'WiVRn right hand interaction'
	Gamepad: '<none>'
	Hand-Tracking Left (unobstructed): 'WiVRn left controller'
	Hand-Tracking Right (unobstructed): 'WiVRn right controller'
	Hand-Tracking Left (conforming): '<none>'
	Hand-Tracking Right (conforming): '<none>'
System Properties for system id:1, with name "Meta Quest 3 on WiVRn", vendorID=0
	Max Layers          : 128
	Max Swapchain Height: 16384
	Max Swapchain Width : 16384
	Orientation Tracking: True
	Position Tracking   : True
	Hand Tracking       : 1
Runtime supports 1 view configurations
Type XR_VIEW_CONFIGURATION_TYPE_PRIMARY_STEREO: FOV mutable: True
Runtime supports 3 reference spaces:
	XR_REFERENCE_SPACE_TYPE_VIEW
	XR_REFERENCE_SPACE_TYPE_LOCAL
	XR_REFERENCE_SPACE_TYPE_STAGE
View Configuration View 0
	Resolution       : Recommended: 2064x2162, Max: 4128x4324
	Swapchain Samples: Recommended: 1, Max: 1
View Configuration View 1
	Resolution       : Recommended: 2064x2162, Max: 4128x4324
	Swapchain Samples: Recommended: 1, Max: 1
error: [/home/davide/Downloads/Slicer-5.13.0-2026-06-29-linux-amd64/bin/SlicerApp-real] exit abnormally - Report the problem.

C) I tried to compile on linux the slicervirtualreality extension (master branch) against the latest Slicer Slicer/Slicer@d401fce and I got the same crash.
Unfortunately I don't have currently enough time to investigate the crash, here it is the stack trace if it can help: