Updated to include USB camera.
2 Likes
The challenge is that if you passthrough IOMMU group 6 (as per the diagram) to a domain, that will successfully allow access to USB2/3 devices plugged into the 3 non-thunderbolt ports.
If you connect a USB2 device to the Thunderbolt port it will also be passed through to the domain, but a USB3 or Thunderbolt device won’t. What would be ideal, is if a USB2 device connected to this port internally connected to Bus 1, but I haven’t found a laptop yet that does this so I am guessing it is something to do with the Intel chip as opposed to the mainboard traces but I don’t know this for sure.
The main drama I can see with having effectively all USB ports tied to one bus is that HID devices like mice and keyboards have no where to go. At least, with a non-powered Thunderbolt dock, these can be attached to that, and the internal USB ports are left for connection to devices that need predictable USB power and connectivity.
1 Like