Comment # 1 on bug 1070630 from James Fehlig

I'm confused about the relationship between libvirt, qemu, kvm, and virtualbox
in your setup. Is your machine a virtualbox "host" and you are trying to use
libvirt to manage virtualbox VMs? Or are you running libvirt+qemu inside a
virtualbox VM? Or is your machine a kvm "host" and you are trying to use
libvirt to manage a kvm VM running virtualbox? Or something else?