ARC A770 PCVR not working with ResizableBar

[MikeSierra]

My Setup: Intel ARC770 16GB, PCVR via VirtualDesktop and PICO4
I bought the ARC A770 16GB on February 14th and then operated it in the ancient system (ASRock Z170 i3-6100) until the current upgrade to AM5 with 7800X3D.
The ASRock Fatal1ty Z170 Gaming-ITX/ac only has PCIe 3.0 x16 and no ResizebleBar (VERY IMPORTANT INFO !!!)
It ran all my SteamVR titles as well as HL-Alyx, Subnautica, etc.

But now finally the upgrade to MSI B650M MORTAR WIFI with Ryzen 7800X3D and I'm desperate with PCVR.
HL Alyx hangs and does not start the game, Subnautica crashes immediately.
I tried everything possible, especially yesterday, but gave up, annoyed and completely exhausted.

Had a flash of inspiration after coffee this morning.
I turned off ResizeBar because my old system didn't have that.
Lo and behold, all SteamVR titles are running again.
I hope the bug will be fixed soon

[Jean_Intel]

Hello MikeSierra,

Thank you for reaching out to the Intel Communities. We understand your frustration with trying multiple solutions without success, but we're happy to hear that disabling Resizable BAR fixed the game issues.

Regarding your concern, we'd like to inform you that Intel Arc graphics support for VR headsets continues to evolve as we ramp our products and add updates to our software stack.

We will be closing this thread now but if you need further assistance, please feel free to create a new question as we won't be monitoring this thread anymore. Your other related threads will also be closed since they're all connected to this specific issue.

Best regards,

Jean O.

Intel Customer Support Technician