[Bug 1891035] Re: I am unable to update my Ubuntu from 18.04 to 20.4 despite all efforts

[Brian Murray]

It is not enough to just turn off sources for third party packages, you
actually need to revert back to the official versions of the package
from the Ubuntu archive. This can be done with the tool 'ppa-purge' and
you'll need to at least do it for the kisak mesa packages you have
installed.

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

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https://bugs.launchpad.net/bugs/1891035

Title:
  I am unable to update my Ubuntu from 18.04 to 20.4 despite all efforts

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

Bug description:
  I tried updating from ubuntu 18.04 to 20.04. It gave errors previously
  saying that third party applications were causing problems and then
  the it stopped midway. I turned off the repositories of third party
  apps in Software and updates. This time it just stated that 'Could not
  calculate the upgrade. An unresolvable problem occurred while
  calculating the upgrade.'

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.16
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Aug 10 19:47:32 2020
  InstallationDate: Installed on 2018-08-13 (727 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_IN
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-08-10 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2020-08-10T19:43:00.375714

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