[Bug 1931863] Re: Upgrade from 18.04 LTS to 20.04.2 LTS impossible

[Chris Guiver]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

Bug reporting is mostly about finding & fixing problems thus preventing
future users from hitting the same bug.

I suspect a Support site would be more appropriate, eg.
https://answers.launchpad.net/ubuntu. You can also find help with your
problem in the support forum of your local Ubuntu community
http://loco.ubuntu.com/ or asking at https://askubuntu.com or
https://ubuntuforums.org, or for more support options please look at
https://discourse.ubuntu.com/t/community-support/709

(I haven't looked far, but I see reference to a PPA that has no support
for any release past 14.04; ie.
https://launchpad.net/~tualatrix/+archive/ubuntu/ppa   PPA's are 3rd
party sources, so all security checks are the responsibility of the end-
user; and a PPA that doesn't support releases later than 14.04, was last
touched in 2014 is a warning sign that it should not be touched)

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https://bugs.launchpad.net/bugs/1931863

Title:
  Upgrade from 18.04 LTS to 20.04.2 LTS impossible

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

Bug description:
  Hi to all!
  I still can't upgrade 'naturally' from  Ubuntu 18.04 to 20.04.2 due to a ppa apparently not coming from Ubuntu. The error message advised me to launch ppa purge, what I did, but nothing changed. So I started to check out a explanation and solution on forums, but found nothing usefull to my problem so far. For your information, I'm not an advanced user of ubuntu, i'm pretty much a newbie, but want to learn each time an issue occur, and I'm french, so pardon me my accent ;)

  Could you please help? Thank you in advance
  Guillaume

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.44
  ProcVersionSignature: Ubuntu 4.15.0-144.148-generic 4.15.18
  Uname: Linux 4.15.0-144-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.24
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Jun 14 14:21:07 2021
  InstallationDate: Installed on 2013-06-10 (2925 days ago)
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-06-14 (0 days ago)
  VarLogDistupgradeTermlog:

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