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

[Serge Hallyn]

@Sam,

I have the license now, but haven't had a chance to reproduce yet,
sorry.  It's on my list.

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https://bugs.launchpad.net/bugs/685096

Title:
  USB Passthrough not working for Windows 7 guest

Status in QEMU:
  Confirmed
Status in “qemu-kvm” package in Ubuntu:
  Confirmed

Bug description:
  USB Passthrough from host to guest is not working for a 32-bit Windows
  7 guest, while it works perfectly for a 32-bit Windows XP guest.

  The device appears in the device manager of Windows 7, but with "Error
  code 10: device cannot start". I have tried this with numerous USB
  thumbdrives and a USB wireless NIC, all with the same result. The
  device name and functionality is recognized, so at least some USB
  negotiation is taking place.

  I am trying this with the latest git-pull of QEMU-KVM.

  The command line to launch qemu-kvm for win7 is:
  sudo /home/user/local_install/bin/qemu-system-x86_64 -cpu core2duo -m 1024 
-smp 2 -vga std -hda ./disk_images/win7.qcow -vnc :1 -boot c -usb -usbdevice 
tablet -usbdevice host:0781:5150

  The command line to launch qemu-kvm for winxp is:
  sudo /home/user/local_install/bin/qemu-system-x86_64 -cpu core2duo -m 1024 
-smp 2 -usb -vga std -hda ./winxpsp3.qcow -vnc :0 -boot c -usbdevice tablet 
-usbdevice host:0781:5150

  Any help is appreciated.

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