I''m trying to pass USB devices through to a domU, but I am running in to the following problem: # xm usb-list-assignable-devices 3-2 : ID 0a81:0101 CHESEN USB Keyboard 4-1 : ID 045e:00dd Microsoft Comfort Curve Keyboard 2000 5-2 : ID 1532:0017 Razer Razer Imperator 8-2 : ID 1267:0210 Logic3 / SpectraVideo plc [root@normandy ~]# xm usb-attach edi 0 1 3-2 Unexpected error: <class ''xen.util.vusb_util.UsbDeviceParseError''> Please report to xen-devel@lists.xen.org Traceback (most recent call last): File "/usr/sbin/xm", line 7, in <module> main.main(sys.argv) File "/usr/lib64/python2.6/site-packages/xen/xm/main.py", line 3983, in main _, rc = _run_cmd(cmd, cmd_name, args) File "/usr/lib64/python2.6/site-packages/xen/xm/main.py", line 4007, in _run_cmd return True, cmd(args) File "/usr/lib64/python2.6/site-packages/xen/xm/main.py", line 3046, in xm_usb_attach if vusb_util.bus_is_assigned(bus): File "/usr/lib64/python2.6/site-packages/xen/util/vusb_util.py", line 275, in bus_is_assigned raise UsbDeviceParseError("Can''t get assignment status: (%s)." % bus) xen.util.vusb_util.UsbDeviceParseError: vusb: Error parsing USB device info: Can''t get assignment status: (3-2). Am I missing a step here? Gordan