Prevent do-release-upgrades on P8 systems from focal or impish to jammy

[Frank Heimes]

Starting with Ubuntu Server 22.04 ppc64el is compiled for Power 9 processors.
Prior to 22.04 it was/is compiled for Power 8 processors.
Hence P8 processors are not able to run, install or upgrade to jammy.

So do-release-upgrades on a Power 8 system from last LTS (focal) or last non-LTS (impish) <afaik these are the only two supported options> to jammy should be prevented.

[Nick Rosbrook (enr0n)]

Hi Frank,

Could you please provide the following info from your P8 system?

1. The contents of /proc/cpuinfo
2. Output of `apt-config dump | grep APT::Architecture`

Thanks!

[Frank Heimes (fheimes)]

Hi Nick.
output for 1.
https://pastebin.ubuntu.com/p/mKtMTzhSpn/
and for 2.
$ apt-config dump | grep APT::Architecture
APT::Architecture "ppc64el";
APT::Architectures "";
APT::Architectures:: "ppc64el";

[Brian Murray (brian-murray)]

Oops, typo'ed bug number.

ubuntu-release-upgrader (1:22.04.6) jammy; urgency=medium

  * Prevent upgrades to jammy on POWER8 (LP: #19602550).

 -- Nick Rosbrook <email address hidden> Wed, 23 Feb 2022 12:37:39 -0800