Not sure if libvirt or qemu is the best component to report this.

I have a server that was running Fedora 14 that runs 6 VMs. I double bumped it from F-14 -> F15 and then half a day later to F-16. On upgrade from F-14 to F-15 the VMs were running and starting on boot as expected. On the upgrade from F-15 to F-16 they no longer run and give the following output below.

Error restoring domain: internal error Process exited while reading console log output: Supported machines are:
pc         Standard PC (alias of pc-0.14)
pc-0.14    Standard PC (default)
pc-0.13    Standard PC
pc-0.12    Standard PC
pc-0.11    Standard PC, qemu 0.11
pc-0.10    Standard PC, qemu 0.10
isapc      ISA-only PC


Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 44, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 65, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1050, in startup
    self._backend.create()
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 510, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: internal error Process exited while reading console log output: Supported machines are:
pc         Standard PC (alias of pc-0.14)
pc-0.14    Standard PC (default)
pc-0.13    Standard PC
pc-0.12    Standard PC
pc-0.11    Standard PC, qemu 0.11
pc-0.10    Standard PC, qemu 0.10
isapc      ISA-only PC