[Bug 1898183] Re: Ubuntu OS upgrade unsuccessful due to unofficial packages

[Brian Murray]

*** This bug is a duplicate of bug 1889250 ***
    https://bugs.launchpad.net/bugs/1889250

Reviewing the files from your upgrade attempt you have installed nodejs
from a location other than the offical Ubuntu archive. This version of
nodejs is greater than the one in the official archive and is keeping
some python packages installed which then prevents the upgrade from
being calculated. Please remove nodejs along with any other packages
from that archive and disable the archive. After that you can try
upgrading again and if it still fails open a new bug report. Thanks and
good luck!

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

** Tags added: nodesource-nodejs

** This bug has been marked a duplicate of bug 1889250
   Unable to calculate the upgrade to 20.04 due to nodejs from nodesource

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https://bugs.launchpad.net/bugs/1898183

Title:
  Ubuntu OS upgrade unsuccessful due to unofficial packages

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

Bug description:
  Log message after the reading the system state information:

  1. Calculating the changes
  2. Could not calculate the upgrade
  3. An unresolvable problem occured while calculating the upgrade.
  4. This was likely caused by: * Unofficial software packages not provided by Ubuntu. Please use tool 'ppa-purge' from the ppa-purge package to remove a launchpad PPA.

  Tried to ppa-purge but issue still persists.
  Had ROS installed. So uninstalled it-
  >> sudo apt-get purge ROS-*

  Also removed all the unrequired packages-
  >> sudo apt-get autoremove

  Problem still persists.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 5.4.0-48.52~18.04.1-generic 5.4.60
  Uname: Linux 5.4.0-48-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Oct  2 16:39:21 2020
  InstallationDate: Installed on 2019-10-03 (365 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-10-02 (0 days ago)

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