In trying to find out why my usb passthrough is not working, I decided
to edit (virsh edit) the config file for the vm client, removing the
following lines
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x051d'/>
<product id='0x0002'/>
</source>
</hostdev>
checking with "virsh dumpxml" that the lines went away, and then restarting
[root@vmhost ~]# virsh start nagios
error: Failed to start domain nagios
error: internal error Did not find USB device 51d:2 bus:2 device:3
[root@vmhost ~]#
As you can see, it is still acting like the usb device is defined.
What am I missing here?