I've only recently been made aware of the apt history, so I maintain my own log 
of things that I change or install. I found these steps in my log:
```
sudo apt install cpu-checker
then kvm-ok to check.

KVM
sudo apt-get install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils
sudo adduser `id -un` libvirtd
sudo adduser `id -un` kvm
sudo apt install virt-viewer
sudo apt install virt-manager
logout and back in again

These steps NOT done yet.  May now be unnecessary:
sudo apt install python-spice-client-gtk
sudo apt install spice-client (also needed in VM)


Disable ModemManager
sudo systemctl disable ModemManager.service
```

Unfortunately, I can't remember if I did perform those 2 steps that I marked as 
possibly unnecessary.
As there's a later entry that installed Python 3.6.9, I'm guessing these 
entries where on Ubuntu 18.04 or 20.04, before I upgraded to 22.04. It would 
have been whatever was the latest LTS version of Ubuntu at the time that Python 
3.6 was the latest Python 3 version.

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https://bugs.launchpad.net/bugs/2169687

Title:
  Error starting domain: spice graphics are not supported with this QEMU

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