Arc B50 Pro Crashes VM

bellaireroad

New Member
Sep 30, 2025
26
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Hello, not sure where I have gone wrong, but I am trying to add an ARC Pro B50, and it is crashing the W11 VM and Mint VM. They freeze on startup, will not shutdown, and the node freezes as well..showing a watchdog error on a core. This requires a cold boot to restart the node

Proxmox version 9.1.5
6.17.9-1-pve
The machine is a SM X12SDV 20C

WHAT HAS BEEN DONE

BIOS has above 4G encoding enabled
Intel Vt-D is enabled
SRIOV is enabled
(There is no rebar setting in the latest BIOS)


intel_iommu=on iommu=pt

(added to /etc/modules)
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd

Please see attachments, thank you
 

Attachments

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I don't know what you based your settings on, but you should start by configuring them correctly.

If you asked AI or something, don't bring those results here. It merely spits out results—mixing in version mismatches and failed configurations—without actually creating anything.

You should always use documentation for configuration.

https://pve.proxmox.com/wiki/PCI(e)_Passthrough
 
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I don't know what you based your settings on, but you should start by configuring them correctly.

If you asked AI or something, don't bring those results here. It merely spits out results—mixing in version mismatches and failed configurations—without actually creating anything.

You should always use documentation for configuration.

https://pve.proxmox.com/wiki/PCI(e)_Passthrough
Thank you for your reply.

In response, I followed other posts in the forum dealing specifically with the B50 configuration. After reviewing the wiki, it seems that the kernal modification has not been added in my config, but I don't recall seeing that in other forum posts.(edit- it has been added) I wonder if it is recommended with the Xe kernal.

What did you see that told you it was configured incorrectly, and that AI was used?

The configuration I created is causing the system to lock up, and triggering a watchdog function on a CPU core. I have not seen that mentioned in any other posts.
 
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Here is the output of system log, from the time the VM is started to the time the CPU locks up. Anyone see the problem? thanks1.png2.png3.png
 
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