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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/685096 Title: USB Passthrough not working for Windows 7 guest To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/685096/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
