Comment # 14 on bug 1177763 from Peter McDonough

(In reply to John Doe from comment #9)
> 
> I added myself to the libvirt group to see if it would change anything but
> the issue remains the same.
> 

Solution: LIBVIRT GROUP to USER

Isn't it always the obvious, which is hardest to see?

 I didn't add the libvirt group to the user, so the user needs root for
starting libvirt.

 Test: 
 I reinstalled Tumbleweed from a backup, pre-libvirt status.
 Installed kvm+tools
 added libvirt group to the user

 Just to make sure, rebooted Tumbleweed

 Called up virtual-manager as user, installed and run a virtual machine.

 No problems at all, 
 apart from the missing KVM Default Network, 
 which needed.

 sudo virsh net-start default
 sudo  virsh net-autostart --network default

 Peter