How to upgrade virt-manager and all its dependencies without upgrading ubuntu 20.04

[Mario Marietto]

Hello to everyone.

I'm using Ubuntu 20.04 on the Jetson nano. I'm trying to virtualize FreeBSD
13.2 using virt-manager with all the dependencies that it brings,but I see
that the version shipped with ubuntu 20.04 is obviously bugged and I would
like to upgrade it. In this specific case,I see that there is a bug in
libvirt that does not allow to boot FreeBSD 13.2 for arm64 / aarch64,that
I've got from here :

https://download.freebsd.org/releases/arm64/aarch64/ISO-IMAGES/13.2/FreeBSD-13.2-RELEASE-arm64-aarch64-disc1.iso


These are the Hypervisor details :


Hypervisor = KVM

Architecture = aarch64

Emulator = /usr/bin/qemu-system-aarch64

Machine type = virt-4.2

Firmware = UEFI aarch64 : /usr/share/AAVMF/AAVMF_CODE.fd


the error that I get is :
qemu-system-aarch64: initialization of device cfi.pflash01 failed. device
requires 67108864 bytes,block backend provides 67112960 bytes...

Point is that I can't upgrade Ubuntu 20.04 to a new release,because doing
it I will lose the functionality of all the nVidia tools bundled with the
official Jetson nano pack that are shipped with ubuntu 18.04. I've Been
able to upgrade ubuntu 18.04 to 20.04 following this tutorial :

https://qengineering.eu/install-ubuntu-20.04-on-jetson-nano.html

but I doubt that I will be able to perform another upgrade. So I would like
to understand how can I upgrade ONLY the qemu + libvirt + virt-manager. I
prefer for sure to install everything from deb files rather than compiling
from sources,because doing this is much more complicated 'cause all the
parameters have to pass to the compiler.

Anyway,what's your suggestion ? thanks.

-- 
Mario.
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