"restarting" vm from virt-manager does nothing

[Andrew Bolster]

Binary package hint: virt-manager

Jaunty KVM amd64 host running:
  libvirt 0.6.1-0ubuntu5
  kvm 1:84+dfsg-0ubuntu10

On attempting to restart a vm from the virt-manager console for that vm, presented with following failure information (without restart happening or anything crashing, it just doesn't restart):

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 528, in reboot_domain
    vm.reboot()
  File "/usr/share/virt-manager/virtManager/domain.py", line 504, in reboot
    self.vm.reboot(0)
  File "/usr/lib/python2.6/dist-packages/libvirt.py", line 392, in reboot
    if ret == -1: raise libvirtError ('virDomainReboot() failed', dom=self)
libvirtError: this function is not supported by the hypervisor: virDomainReboot