Comment # 13 on bug 1177763 from Peter McDonough

(In reply to James Fehlig from comment #8)
> (In reply to John Doe from comment #7)
> > sudo systemctl status libvirtd:
> ...
> > virt-manager --debug:
> 
> Ah, a small hint that virt-manager is run as a normal user. Is this the
> case? Same question for you Peter.
> 
> I initially saw the problem when starting virt-manager as a normal user. I
> tried adding a new 'qemu:///system' connection using the "Add Connection"
> wizard and it worked after providing root passwd. I then added a
> 'qemu:///session' connection and it also worked. And I no longer see the
> problem when restarting virt-manager.
...

Sorry, I'm late.

Now I notice it, too. In Leap 15.2 the root password is requested when starting
the virtual-manager, not so in Tumbleweed.

So, adding a new 'qemu:///system' connection using the "Add Connection"
wizard and just clicking connect (Verbinden) does it. 
Everything works as in Leap.

Thanks.