virsh fails to start kvm domain with bridged nic

[mk]

Binary package hint: libvirt-bin

Release: 10.04 Ubuntu lucid (development branch)
Package: libvirt-bin 0.7.2-4ubuntu5

As user root, I try to start a kvm domain which uses a virtio nic bridged to br0, but it fails:

# virsh --connect qemu:///system
setlocale: No such file or directory
Welcome to virsh, the virtualization interactive terminal.

Type: 'help' for help with commands
       'quit' to quit

virsh # start uvd
error: Failed to start domain uvd
error: Failed to add tap interface to bridge 'br0': No such file or directory

virsh #

Definition of the virtual nic of domain uvd:

<interface type='bridge'>
<mac address='54:52:00:0f:a2:9d'/>
<source bridge='br0'/>
 <model type='virtio'/>
</interface>

Bridge definition in /etc/network/interfaces:

auto br0
iface br0 inet static
  address 10.13.13.20
  netmask 255.255.255.0
  gateway 10.13.13.1
  bridge_ports eth0
  bridge_fd 1
  bridge_stp on
  pre-up ifup eth0

iface eth0 inet manual

ProblemType: Bug
Architecture: amd64
Date: Thu Jan 7 13:13:03 2010
DistroRelease: Ubuntu 10.04
NonfreeKernelModules: nvidia
Package: libvirt-bin 0.7.2-4ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-9.13-generic
SourcePackage: libvirt
Tags: lucid
Uname: Linux 2.6.32-9-generic x86_64

[mk (harald-hetzner)]

After upgrading to kernel 2.6.32-10-generic, the domain with the bridged nic starts.

[Chuck Short (zulcss)]

Thanks for the bug report, closing.

Regards