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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 13 Jun 2014 09:33:30 +0200
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Subject: Re: [Qemu-devel] USB passthrough in qemu
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To: Michal Suchanek <hramrach@gmail.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

  Hi,

> However,
> -device nec-usb-xhci -usbdevice host:0b95:772b -usbdevice tablet
> gives empy xhci bus and both devices attached to uhci bus which does not work.

Either drop '-usb' so xhci is the only usb controller, or use -device
usb-$device,bus=$name to explicitly say which controller you want your
device attach to.

cheers,
  Gerd