I found 2 issues running libvirt 0.8.6 with spice: The first is about a not supported Spice parameter in qemu command: https://bugzilla.redhat.com/show_bug.cgi?id=664190 The second is about a missing capability in "qemu -help": https://bugzilla.redhat.com/show_bug.cgi?id=664192 Pahim