[Bug 1898488] Re: ubuntu upgrade failed because of unnoficial software packages

[Brian Murray]

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

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1889250, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** 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/1898488

Title:
  ubuntu upgrade failed because of unnoficial software packages

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

Bug description:
  1) Ubuntu 18.04.5 LTS
  2) N/A
  3) I expected the upgrade from Ubuntu 18 to Ubuntu 20 would go smoothly
  4) Received a error message stating "Could not calculate the upgrade" and that it was most likely caused by "Unofficial software packages not provided by Ubuntu". Both were confusing.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-118.119-generic 4.15.18
  Uname: Linux 4.15.0-118-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Oct  4 17:49:44 2020
  InstallationDate: Installed on 2018-09-06 (759 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-10-04 (0 days ago)
  VarLogDistupgradeTermlog:

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