something changed in the kvm audio subsystem, so a virt that was
suspended during shutdown wouldn't resume after reboot. the logs had
complaints of:
savevm: unsupported version 2 for 'hda-audio' v1
load of migration failed
i poked around on the rh bz site and found a few hits, but they seemed
to be related to older versions. i forced a clean boot of my vm and it
was happy.