Hello Michel

As far as I remember we had the same problem when migrating from Yoga/EL8 to Yoga/EL9

If I am not wrong, for us the fix was simply installing these packages:

"qemu-kvm-device-display-virtio-vga", "qemu-kvm-device-display-virtio-gpu", "qemu-kvm-device-display-virtio-gpu-pci"

Cheers, Massimo

On Tue, Apr 30, 2024 at 12:14 PM Michel Jouvin <michel.jouvin@ijclab.in2p3.fr> wrote:

Hi,

After upgrading a compute server from Yoga/EL8 to Antelope/EL9, I cannot
start VM on it. nova-compute log says:

----

Failed to build and run instance: libvirt.libvirtError: unsupported
configuration: domain configuration does not support video model 'virtio'

----

According to https://bugs.launchpad.net/nova/+bug/2018172, it seems the
problem also existed when trying to deploy nova-compute Yoga/Zed on EL9
but what fixed the problem is not clear in the issue...

Any idea about what could cause this problem and how to fix it?

Best regards,

Michel