Beat Saber (620980)

Compatibility Report

• Name of the game with compatibility issues: Beat Saber (unity_alpha branch)
• Steam AppID of the game: 620980

System Information

• GPU: PowerColor RX 6600 XT
• Driver/LLVM version: Mesa 22.3.6-1
• Kernel version: 6.1.18-200
• Link to full system information report as Gist:
• Proton version: Proton experimental, Proton 7.0-6 (same issue)
• Arch distrobox container under Fedora Silverblue 37

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.

steam-620980.log

Symptoms

Can't launch it on newest version that uses OpenXR instead of OpenVR. It shows logo for a split second and closes.

Bonelab on latest beta (openxr powered game) under proton works fine.

Reproduction

Always.

1. Change beat saber beta to unity_alpha
2. Run SteamVR (be it alvr, or native headset)
3. Run Beat Saber
4. Crash

Additional notes

In logs there is mentions of missing extension like XR_KHR_D3D12_enable, which is not implemented by Proton at the moment, which is probably the reason it can't start.
Tried to run with -force-vulkan but it crashes with InitialiseGraphicsEngine error (probably wasn't built with vulkan support)

Start with the attached steam-620980.log and the referenced wineopenxr/openxr.c extension-handling section. Reproduce the failure using the unity_alpha branch, SteamVR, and the listed Proton versions, then compare the OpenXR initialization messages with the missing XR_KHR_D3D12_enable extension. Done means Beat Saber starts successfully on the affected configuration.