*** This bug is a duplicate of bug 350598 ***
    https://bugs.launchpad.net/bugs/350598

Public bug reported:

This seems to be either a kvm or virt-manager bug. I tried to run an XP
and Vista image I had created under 8.10 and they failed to load with
this error message:

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 498, in run_domain
    vm.startup()
  File "/usr/share/virt-manager/virtManager/domain.py", line 508, in startup
    self.vm.create()
  File "/usr/lib/python2.6/dist-packages/libvirt.py", line 287, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: internal error Failed to add tap interface 'vnet%d' to bridge 
'virbr%d' : No such device

Here is the config xml file:

<domain type='kvm'>
  <name>XP</name>
  <uuid>c37de28d-1083-c06e-9ce7-385a21967524</uuid>
  <memory>1048576</memory>
  <currentMemory>1048576</currentMemory>
  <vcpu>1</vcpu>
  <os>
    <type>hvm</type>
    <boot dev='hd'/>
  </os>
  <clock offset='localtime'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <disk type='file' device='disk'>
      <source file='~/XP.img'/>
      <target dev='hda' bus='ide'/>
    </disk>
    <disk type='file' device='cdrom'>
      <source file='~/xpprosp3.iso'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
    </disk>
    <interface type='network'>
     <mac address='00:16:3e:13:05:9d'/>
     <source network='default'/>
    </interface>
    <input type='tablet' bus='usb'/>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' listen='127.0.0.1'/>
  </devices>
</domain>

** Affects: ubuntu
     Importance: Undecided
         Status: New

** This bug has been marked a duplicate of bug 350598
   Fails to start VM after Jaunty upgrade: Failed to add tap interface 'vnet%d' 
to bridge 'virbr%d'

-- 
kvm images created under 8.10 fail to load
https://bugs.launchpad.net/bugs/350751
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