Comment 6 for bug 562189

I got the same problem.

matthew@0xB1uE7:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu lucid (development branch)
Release: 10.04
Codename: lucid
matthew@0xB1uE7:~$ uname -a
Linux 0xB1uE7 2.6.32-21-generic #32-Ubuntu SMP Fri Apr 16 08:09:38 UTC 2010 x86_64 GNU/Linux

ii kvm 1:84+dfsg-0ubuntu16+0.12.3+noroms+0ubuntu6 dummy transitional pacakge from kvm to qemu-kvm
ii libvirt-bin 0.7.5-5ubuntu25 the programs for the libvirt library
ii libvirt0 0.7.5-5ubuntu25 library for interfacing with different virtualization sy
ii python-libvirt 0.7.5-5ubuntu25 libvirt Python bindings
ii python-vm-builder 0.12.3-0ubuntu1 VM builder
ii qemu-kvm 0.12.3+noroms-0ubuntu6 Full virtualization on i386 and amd64 hardware
ii qemu-kvm-extras 0.12.3+noroms-0ubuntu6 fast processor emulator binaries for non-x86 architectur
ii ubuntu-virt-mgmt 1.2 Common packages useful for managing virtual machines gra
ii ubuntu-virt-server 1.2 Common packages necessary for hosting virtual machines
ii ubuntu-vm-builder 0.12.3-0ubuntu1 Ubuntu VM builder
ii virt-manager 0.8.2-2ubuntu8 desktop application for managing virtual machines
ii virt-viewer 0.0.3-6ubuntu7.xul191.1 Displaying the graphical console of a virtual machine