Comment 15 for bug 1847806

To get a better hold of the actual bad instruction I installed Ubuntu 19.10 in a guest using the 3.1 based machine type. Then after the full install (much more capable than the busybox of the installer) I switched the machine type and booted up with the new machine type that also implies the power9 cpu.

With that it still boots up, but I've seen a few illegal instructions.

On login I see /etc/update-motd.d/98-fsck-at-reboot, also apt install of gdb failed.
In the journal I have found 8 more.

I can't install anything, so it seems I need to switch back and forth between CPU types whenever I need anything on top ...
But now (full install) fortunately the crash collection in /var/crash worked so I have a few dumps to check.

With the older emulated CPU I then went into debugging these cases to check for a common pattern ...