KVM issue

[MR ZenWiz]

I'm starting to try out kvm as a possible replacement for my VirtualBox VMs.

My machine is running Xubuntu 21.10 and I have installed the following modules:

First shot: qemu-kvm libvirt-daemon-system libvirt-clients
bridge-utils virtinst virt-manager

After the group adjustments and a logout-login cycle, and a systemctl
edit of the libvirtd service to add /usr/lib as a library, I ran the
virt-manager and got this error on a New:

Warning: KVM is not available. <and a lot of related text that doesn't copy>

It seems to be up and running, so I poked around and found this
install - linux-kvm.

I added that and still get the warning.

What did I miss?  What else needs to be installed to use kvm?

Thanks.

Mark