Ubuntu 15.04 Fresh new installation so all packages are up to date.
Trying to edit libvirt xml file. Using $ sudo EDITOR=gedit virsh edit win81
Added
<kvm>
<hidden state='on'/>
</kvm>
then receive following error message
error: XML document failed to validate against schema: Unable to validate doc against /usr/share/libvirt/schemas/domain.rng
Extra element devices in interleave
Element domain failed to validate content
Help please