X11SMM-F or X11SSL-F & Intel Arc Passthrough

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Jan 23, 2026
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Has anyone gotten an Intel ARC GPU working in passthrough with a Supermicro X11SSL-F or X11SSM-F board for either a Windows or Linux guest? They are substantially similar except one has the C232 chip and the other one one has a C236 ship + extra PCI slot, but their BIOS options are almost identical.
If so, do you mind please sharing BIOS settings and PVE/Guest configuration?
I've tried every "guide" on the internet with my system.
VT-D is enabled, 4G decoding is enabled, CSM is disabled, etc - all the usual settings. The GPU is in it's own IOMMU group, and I'm passing through the GPU and it's sound device. VFIO is working. This same GPU worked in passthrough perfectly on another system. The board does not have ReBAR support, but I've had pass-through working on another board that was even older that also did not have ReBAR support and pass-through worked. Board BIOS is the latest (3.6 from ~2025)
For what it's worth, I also have an LSI SAS adapter passed through to another VM that's working perfectly; it's the GPU that I can't get to work.
On Windows, I get the "code 43" error.
On Linux, I get:
"
pci_hp_register failed with error -16
pci_hp_register failed with error -16
pci_hp_register failed with error -16
pci_hp_register failed with error -16
Failed to initialize slot"

... during boot and the VM freezes at that point.
Running PVE 9.2
 
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