Comment # 1 on bug 1187555 from James Fehlig

(In reply to Gene Snider from comment #0)
> There seems to be a race condition, because sometimes libvirtd succeeds in
> starting with no errors.

Are you sure libvirtd doesn't start? The errors you mention should cause the
node device driver to ignore the devices, but they shouldn't prevent libvirtd
from starting. If it really doesn't start (check with e.g. 'virsh list' or
'virsh capabilities') please provide the full output from the journal, e.g.
'journalctl --no-hostname -b -u libvirtd'. Thanks!