[Bug 685096] Re: USB Passthrough not working for Windows 7 guest

[Manuel Baesler]

followup:

my understanding is there are a bunch of usb interfaces:

uhci is usb 1.0
ehci is usb 2.0
xhci is usb 3.0
…

-device piix3-usb-uhci will create an usb 1.0 interface. I guess usb 1.0
is insufficent for modern usb devices so windows errors with code 10.
ehci have enough to bring full support for modern usb devices.

qemu is like LEGO where you can wire it all together :-)

refference:
https://github.com/qemu/qemu/blob/master/docs/usb2.txt
https://en.wikipedia.org/wiki/Host_controller_interface_(USB,_Firewire)#USB

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Title:
  USB Passthrough not working for Windows 7 guest

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