Alan Stern wrote: > On Tue, 3 Jul 2012, Gary E. Miller wrote: > > > To clarify things a bit, I have a xHCI controlled chip. That chip > > is ID'ed: 1849:7023. It runs USB 3.0 and has a blue connector. > > > > The xHCI'ed chip is connected, using a USB 3.0 cable to an external > > 4 port USB 3.0 hub. 3 of the hub's USB 3.0 ports have blue USB 3.0 > > connectors. The reamining 1 of the hub's USB 3.0 ports is connected > > internal to the hub to a USB 2.0 hub (black connectors). > > Sarah, how common is that sort of thing? Are USB-3 hubs allowed to > have USB-2 ports? Taking Gary's description literally, it sounds like the USB-3 hub is a compound device which includes a USB-2 hub. Although maybe awkward I don't see why it wouldn't be allowed. The output from lsusb -t might also be helpful to show how that hub is really built. //Peter -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
