[Bug 1960255] Re: Prevent do-release-upgrades on P8 systems from focal or impish to jammy

[Frank Heimes]

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";

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https://bugs.launchpad.net/bugs/1960255

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

Status in The Ubuntu-power-systems project:
  New
Status in ubuntu-release-upgrader package in Ubuntu:
  New
Status in ubuntu-release-upgrader source package in Jammy:
  New

Bug description:
  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.

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