[libvirt-users] Attaching usb devices

[Mauricio Tavares]

	Is the only way to attach a usb device to a vm first specifying the device,

     <hostdev mode='subsystem' type='usb' managed='no'>
       <source>
         <vendor id='0x3080'/>
         <product id='0x1234'/>
       </source>
     </hostdev>

and then booting the vm while the device is attached? Can't I 
attach/detach a USB device to the vm later?  I did try the method 
suggested in 
http://david.wragg.org/blog/2009/03/usb-pass-through-with-libvirt-and-kvm.html 
but did not have much luck.

Also, can anyone explain me what happened in this log excerpt:

husb: open device 1.18
husb: grabbed usb device 1.18
husb: config #1 need 1
husb: 1 interfaces claimed for configuration 1
husb: device 1.18 disconnected