After some further investigation, this bug appears to be a qemu-kvm bug. I installed the lucid version of qemu-kvm, downgraded the domain definition as follows:
<domain type='kvm'> [...] <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> ^^^^^ [...] </domain> And the domain now suspends and resumes reliably. -- 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/771227 Title: Domain save/restore does not work (kvm) -- 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