Comment 0 for bug 1190387

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Bill Mills (wmills) wrote :

Running Ubuntu 12.04 x86_64
libvirt0 and libvirt-bin 0.9.8-2ubuntu17.8 causes a regression.
I am using QEMU/KVM virtual machines.

To reproduce:
   use virsh to create/start a vm
   use virsh to attach-device a host usb device
   use virsh to stop/destroy the vm
   use virsh to create vm again
   use virsh to attach the usb device again

I get:
virsh attach-device vm1 /var/lib/libvirt/hotplug/usb-serial.xml
error: Failed to attach device from /var/lib/libvirt/hotplug/usb-serial.xml
error: Requested operation is not valid: USB device 002:005 is in use by domain ..

Note the ".." characters. That is literal. It is printing garbage characters.
The failure is not 100% of the time but is pretty high (50% ?)

usb-serial.xml:
    <hostdev mode='subsystem' type='usb' managed='yes'>
      <source>
        <vendor id='0x067b'/>
        <product id='0x2303'/>
      </source>
    </hostdev>

backing up libvirt0 and libvirt-bin to 0.9.8-2ubuntu17.7 makes this problem go away.

While looking at this I found a Fedora bug that looks similar. The upstream patches they identified may be of interest.
https://bugzilla.redhat.com/show_bug.cgi?id=814866