[Bug 1891506] Re: can not upgrade to ubuntu 20.04 lts

[Brian Murray]

*** This bug is a duplicate of bug 1899000 ***
    https://bugs.launchpad.net/bugs/1899000

Reviewing the files from your upgrade attempt you seem to have enabled a
PPA that provides sane packages. This will prevent the upgrade as that
PPA contains package version numbers greater than the release to which
you are upgrading. You can revert the PPA by installing the ppa-purge
package from the official Ubuntu archive and then running 'sudo ppa-
purge ppa:sane-project/sane-git' or 'sudo ppa-purge ppa:sane-project
/sane-release' .  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: ppa sane-ppa

** This bug has been marked a duplicate of bug 1899000
   Upgrade 18.04 --> 20.04 fails if using a PPA providing sane packages

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https://bugs.launchpad.net/bugs/1891506

Title:
  can not upgrade to ubuntu 20.04 lts

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

Bug description:
  Impossible d'évaluer la mise à niveau

  Un problème insoluble est survenu lors du calcul de la mise à niveau.

  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: Thu Aug 13 14:52:10 2020
  InstallationDate: Installed on 2020-02-24 (170 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  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 2020-08-13 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2020-08-13T14:40:42.188602

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