Enable debug in /etc/libvirt/libvirtd.conf, restart libvirtd, and see if there is any info indicating why the apparmor driver is not loading. E.g. in /etc/libvirt/libvirtd.conf log_level = 1 log_outputs="1:file:/tmp/libvirtd.log" restart libvird then look for apparmor hints in /tmp/libvirtd.log