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Marvell/Aquantia AQC111U USB 5GbE weirdness (VT-d/IO Mapper related)


i0ntempest
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Hi all,

On my secondary hack running latest Monterey I have connected a Sabrent NT-SS5G which is a AQC111U based ethernet adapter. For it to work I must have DisableIoMapper quirk enabled, or else it will appear to work but a lot of services running on it cannot be accessed, for example screen sharing will initially connect but disconnects and reconnects constantly, and qbittorrent webui does not load completely. The machine it self can reach the internet and network preference shows it has an IP. I also have DMAR table patched, EFI is attached below.

I want to get to the bottom of this. From what I read DisableIoMapper should not be required when DMAR table is patched. And, although it works fine for now if I have DisableIoMapper ticked, Ventura seems to require VT-d so it will not work when it comes out. 

On a separate note... AQC111U seems to be abandoned, as the driver wasn't updated in 2 years. Is there an alternate driver, or is there any other USB 5GbE solutions?

EFI.zip

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