That didn't seem to work. Should it have been testing for package libvirt-bin, rather than for libvirt? I got this:
Waiting to hear from Launchpad about your decision... Package libvirt not installed and no hook available, ignoring brian@brian-desktop:~$ sudo aptitude show libvirt [sudo] password for brian: No current or candidate version found for libvirt Package: libvirt State: not a real package -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to libvirt in Ubuntu. https://bugs.launchpad.net/bugs/853580 Title: Unable to start second virtual machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/853580/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs