[Bug 1909875] Re: no upgrade possible

[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/1909875

Title:
  no upgrade possible

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

Bug description:
  Es konnte nicht ermittelt werden, welche Systemaktualisierungen
  verfügbar sind

  Ein unlösbares Problem trat während der Berechnung der
  Systemaktualisierung auf.

   Die wurde wahrscheinlich verursacht durch:
   * Inoffizielle Software-Pakete, die nicht von Ubuntu bereitgestellt werden
  Bitte verwenden Sie das Tool »ppa-purge« aus dem ppa-purge- 
  Paket, um Software von einem Launchpad PPA zu entfernen und 
  versuchen Sie die Systemaktualisierung erneut.

  Wenn keine dieser zutrifft, melden Sie bitte den Fehler mithilfe des
  Befehls 'ubuntu-bug ubuntu-release-upgrader-core' in einem Terminal.
  Wenn Sie dies selbst untersuchen möchten, finden Sie in den
  Protokolldateien unter »/var/log/dist-upgrade« Details zur
  Systemaktualisierung. Schauen Sie sich insbesondere »main.log« und
  »apt.log« an.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.41
  ProcVersionSignature: Ubuntu 4.15.0-128.131-generic 4.15.18
  Uname: Linux 4.15.0-128-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Jan  2 20:47:58 2021
  InstallationDate: Installed on 2019-01-25 (708 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-01-02 (0 days ago)
  VarLogDistupgradeTermlog:

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