[libvirt] Problem with USB pass-through

Hello, I have a problem with USB pass-through. I can see the USB device in host machine, i see it in libvirt but when attach to VM i get an error: # lsusb ... Bus 002 Device 014: ID 0529:0001 Aladdin Knowledge Systems HASP v0.06 ... # virsh nodedev-list ... usb_device_529_1_noserial usb_device_529_1_noserial_if0 usb_device_529_1_noserial_usbraw ... # virsh dumpxml vm ... <hostdev mode='subsystem' type='usb' managed='no'> <source> <vendor id='0x0529'/> <product id='0x0001'/> </source> </hostdev> ... # cat /var/log/libvirt/qemu/vm.log ... LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin HOME=/ QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc -m 3800 -smp 4 -name vm -uuid 056dad8b-22a4-4472-cb5e-8cf60215a41b -monitor unix:/var/lib/libvirt/qemu/v,.monitor,server,nowait -boot c -drive file=/dev/vg_sata2/vol_vm,if=virtio,boot=on,format=raw -net nic,macaddr=00:00:00:0b:5b:ec,vlan=0,model=virtio,name=net0 -net tap,fd=21,vlan=0,name=hostnet0 -serial none -parallel none -usb -usbdevice tablet -vnc 0.0.0.0:4 -k pt -vga cirrus -usbdevice host:002.014 -balloon virtio husb: open device 2.12 /proc/bus/usb/002/012: No such file or directory Warning: could not add USB device host:002.014 ... I'm using libvirt 0.8.3 with kvm 88. Anyone have see this problem? Regards, -- Carlos Rodrigues <cmar(a)eurotux.com&gt; Investigação e Desenvolvimento Eurotux Informática, S.A. [http://eurotux.com]