Hello Alan, Thanks for responding. > The lack of output from usbmon is probably because the kernel isn't > sending any URBs to the new device. The Set-Address request is sent > automatically by the xHCI controller, and if it doesn't work then > there's nothing for the kernel to communicate with. Is there a difference in how the Set-Address request between a USB 2.0/1.11 spec vs the USB 3.0 spec works? The /* Control Write: <SETUP[0]><IN[1]> */ works for USB 2.0 and 1.11 spec. I am not sure if there is any difference to this format with the USB 3.0 spec. Thanks Joe -- 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