I'm trying to attach a USB device which is attached to my host to a guest instance. The device definition in the XML looks like: <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x046d'/> <product id='0xc111'/> </source> </hostdev> and the device appears in lsusb as USB device 002:018: Bus 002 Device 018: ID 046d:c111 Logitech, Inc. but when I try and start the guest libvirt appears to try and use a different device which doesn't exist: error: unable to set security context '107:107' on '/dev/bus/usb/002/022': No such file or directory This is using the current libvirt-0.7.6-1.fc12.x86_64 package from the F12 virt-preview repository. Tom -- Tom Hughes (tom(a)compton.nu) http://www.compton.nu/