Hi Everyone,
When I 
try and assign a physical device to a guest using virt-manager,
libvirt 
throws an error:
"Failed to create inactive domain"
I'm using 
libvirt 0.8.1 which I compiled myself, along with Xen 4.0 on
Ubuntu 10.04 
Dom0
I'm also using virt-manager 0.8.4 which I compiled 
myself.