dougsland

0)  Close the Virtual Machine Manager or any instance of VM

1) Locate vendor/product id from your device

Example:

shell> lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 004: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 003: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 002: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID eb1b:3212 "blah Technology, Inc. "
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Once you know your vendor and product id:

Vendor id:   0xeb1b
Product id: 0x3212

2) Edit the xml config file from your VM

Example:

shell> vi /etc/libvirt/qemu/NAME_OF_YOUR_VIRTUAL_MACHINE_HERE.xml

Add the following lines:

Example:

<devices> (do not include this line)
    <emulator>/usr/bin/qemu-kvm</emulator> (do not include this line)
     <hostdev mode='subsystem' type='usb'>
     <source>
            <vendor id='0xeb1b'/>
            <product id='0x3212'/>
    </source>
    </hostdev>

3) Save and restart libvirt
shell> /etc/init.d/libvirtd restart

4) Now just start your VM and test if your usb was detectd:

shell from VM> lsusb
Bus 001 Device 002: ID eb1b:3212 "blah Technology, Inc. "
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Done!