Agreed, this is not a dup.
@MikeB,
your kvm command excuted by libvirt is not using kvm-spice. Do you have the qemu-kvm-spice package installed?
Agreed, this is not a dup.
@MikeB,
your kvm command excuted by libvirt is not using kvm-spice. Do you have the qemu-kvm-spice package installed?