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USB Controller Failing During VM Audio Device Interaction

wolfNZ
in VM Engine (KVM)

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So, I have a USB PCI card which fails when I interact with the connected USB audio device. Everything plugged into it disconnects and doesn't reconnect. This is the related error.

 

Jun 16 12:06:40 Tower kernel: DMAR: DRHD: handling fault status reg 2
Jun 16 12:06:40 Tower kernel: DMAR: [DMA Read NO_PASID] Request device [08:00.0] fault addr 0x4013414e000 [fault reason 0x04] Access beyond MGAW

 

It was previously working fine. Not sure what changed.

 

I have tried different ACS override settings - disabled, downstream, multi-function and also the "iommu=pt" kernel setting.

 

We did have a power drop out recently so i'm not sure how to test for potential damage to the PCI card.

 

Any ideas?

Edited by wolfNZ

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