[Bug 1994930] Re: attempting upgrade from 20.04 to 22.04 failes with "unable to calculate upgrade".

[William Wilson]

>From looking at the logs it appears you have packages installed from a
PPA that are in the `trusty` release of that PPA. Can you remove all
packages installed from PPAs, remove all PPAs from your
/etc/apt/sources.list file, and try the upgrade again?

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1994930

Title:
  attempting upgrade from 20.04 to 22.04 failes with "unable to
  calculate upgrade".

Status in ubuntu-release-upgrader package in Ubuntu:
  Incomplete

Bug description:
  Upgraded from 16.04 to 18.04, and from 18.04 to 20.04.  Upgrade from
  20.04 to 22.04 fails with 'unable to calculate upgrade'.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.39
  ProcVersionSignature: Ubuntu 5.4.0-131.147-generic 5.4.210
  Uname: Linux 5.4.0-131-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.24
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Thu Oct 27 00:22:16 2022
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2022-10-27 (0 days ago)
  modified.conffile..etc.default.apport:
   # set this to 0 to disable apport, or to 1 to enable it
   # you can temporarily override this with
   # sudo service apport start force_start=1
   enabled=0
  modified.conffile..etc.update-motd.d.91-release-upgrade: [deleted]
  mtime.conffile..etc.default.apport: 2014-05-14T22:24:51.504111

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