Comment 7 for bug 1968131

I wanted to check if this is more virt-manager or libvirt to call it badly (or call it in a bad environment).

I spawned a default libvirt based guest with uvtool.
In there I then added the most common pattern of

<devices>
 <tpm model='tpm-tis'>
  <backend type='emulator' version='2.0'/>
 </tpm>
</devices>

This is showing kind of the same behavior.
So while most tests before were about using it directly and together with qemu but self-spawned it seems that at least in the current combination it is the way libvirt uses it that breaks the tool.