Cannot launch Ubuntu 16.04 VM from Ubuntu

[Guillaumebeuzeboc]

Describe the bug
Launching a 16.04 VM from Ubuntu is timing out. It results in a VM in an "Unknown" state that cannot be started.

To Reproduce

1. multipass launch 16.04

launch failed: The following errors occurred:
foremost-porcupine: timed out waiting for response

2.multipass start foremost-porcupine

Instance 'foremost-porcupine' is already running, but in an unknown state.
Try to stop it first.

3. multipass stop foremost-porcupine
4. multipass start foremost-porcupine (hangs)
5. multipass list

foremost-porcupine      Unknown           --               Ubuntu 16.04 LTS

Expected behavior
Even if the image is EoL with Ubuntu Pro I should be able to launch and use it.

Logs
multipass.log

Additional info

• OS: [Ubuntu 20.04.6 LTS, Ubuntu 22.04]
• `multipass 1.15.011
• multipassd 1.15.0
• $ multipass info foremost-porcupine

Name:           foremost-porcupine
State:          Unknown
Snapshots:      0
IPv4:           --
Release:        --
Image hash:     65bb42c0d2e0 (Ubuntu 16.04 LTS)
CPU(s):         --
Load:           --
Disk usage:     --
Memory usage:   --
Mounts:         --

• multipass get local.driver
qemu

Additional context
I am trying to test a solution using Ubuntu Pro. Because of cgroup incompatibility I cannot use a container.

[ricab]

Hi @Guillaumebeuzeboc, sorry for the late reply, this slipped through the cracks before.

I am afraid that Xenial is unsupported:

$ multipass find xenial
No images or blueprints found.
$ multipass find --show-unsupported xenial
Image                       Aliases           Version          Description
xenial                                        20211001         Ubuntu 16.04 LTS
daily:xenial                                  20211001         Ubuntu 16.04 LTS

A decision was made a while ago to scope such images out of what Multipass is supposed to support. See #3443 and #1068 for reference. I have just created #3934 though, to provide a better UX for these cases.