Do you know whenever certain low-level usb ops can work with this?
I expect most usb devices to work with this, I don't know about
really weird ones.
Specifically iphone firmware flashing was mentioned on the list.
I think that should work, but that is an interesting case about which
I don't know enough yet.
If that can help you, I may try to capture the usb activities while doing the
next firmware upgrade.
Unfortunately, it'll be under Windows so I don't know what tool I could use for
that.
If I can confirm that the upgrade works with Oracle Virtualbox, I could also
try that, and capture it at guest /and/ host level.