Should also be noted that calling kvm manually with the VM's disk image under the mainline kernel worked fine (for example: kvm -hda $vm_disk). So, it would appear that the problem lies between the new kernel and libvirt in some way.
Should also be noted that calling kvm manually with the VM's disk image under the mainline kernel worked fine (for example: kvm -hda $vm_disk). So, it would appear that the problem lies between the new kernel and libvirt in some way.