I’m trying to test that at this moment.
The problem with that adapter is the ribbon cable carries the power and the card can become unreliable if the power can’t be delivered sufficiently. The one I linked supplements the power with a Floppy power connector, and uses a USB 3.0 non standard A to Mini-B USB 2.0 end but with 3.0 pins cable. That ensures only data is carried, and then the power is dealt with by the board at the other end with the x1 slot.
I’ll give you a Gist:
FL1009 = BAD. Says it supports reset but doesn’t actually.
FL1100 = Early revisions of the firmware suffered, but cards with the latest firmware apparently work fine. Take that with a grain of salt though. When buying a card with this controller, you’re playing a lottery with firmware revision, with some working great, and some being terrible.
VIA VL8XX = AVOID LIKE THE PLAGUE. Fails as soon as iommu=1
Etron = Multiple incompatibility issues with video capture devices over UVC. Not worth the trouble.
Renesas uPD720201 = Contains issues detailed on the VFIO subreddit.
Renesas uPD720202 = If the card has supplemental power input (SATA or Molex) USE IT. With that external power this is the golden chip for VFIO.
Asmedia = VFIO subreddit has been getting a mixed bag of results. Some report reset hangs.
Native Intel USB 3 = No issues natively, not sure about passthrough. One report details no reset capabilities.
Native AMD USB 3 from the CPU = Doesn’t work with VR headsets from one report, likely amperage/firmware/driver issue.
Hub testing:
If your upstream controller has broken power management, it can affect your hub to completely crash the hub firmware and lose all connections downstream in terms of USB 3.0 connections. USB 2.0 seems better suited for power management on a powered hub if you limit everything to USB 2.0. The key thing for USB 3.0 is your upstream controller has to be rock solid. (AKA just use the Renesas uPD720202)
Side note:
The ExtremeCap U3 isn’t supported in Linux, but the ExtremeCap UVC is supported in Linux, even over USB 2.0.