[Bug 1891381] [NEW] I cannot upgrade from ubuntu 18.04 LTS to 20.04 LTS

[Xavier Andreu Álvarez]

Public bug reported:

The update could not be calculated

An unresolved issue occurred while calculating the update.

 This may be due to:
 * Unofficial software packages not provided by Ubuntu.
Use the "ppa-purge" tool in the ppa-purge package
to remove software from a Launchpad PPA and
tone it down to try.

If none of this applies, then please report this bug using the command
'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If you want to
investigate, the log files in "/ var / log / dist-upgrade" contain the
details of the update. Specifically, see "main.log" and "apt.log."

I used "ppa-purge" tool, but it did not work.

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: XFCE
Date: Wed Aug 12 20:31:41 2020
InstallationDate: Installed on 2019-08-17 (361 days ago)
InstallationMedia: Xubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-08-12 (0 days ago)
VarLogDistupgradeTermlog:
 
mtime.conffile..etc.update-manager.release-upgrades: 2020-08-12T19:17:45.369468

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages

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https://bugs.launchpad.net/bugs/1891381

Title:
  I cannot upgrade from ubuntu 18.04 LTS to 20.04 LTS

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

Bug description:
  The update could not be calculated

  An unresolved issue occurred while calculating the update.

   This may be due to:
   * Unofficial software packages not provided by Ubuntu.
  Use the "ppa-purge" tool in the ppa-purge package
  to remove software from a Launchpad PPA and
  tone it down to try.

  If none of this applies, then please report this bug using the command
  'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If you want
  to investigate, the log files in "/ var / log / dist-upgrade" contain
  the details of the update. Specifically, see "main.log" and "apt.log."

  I used "ppa-purge" tool, but it did not work.

  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: XFCE
  Date: Wed Aug 12 20:31:41 2020
  InstallationDate: Installed on 2019-08-17 (361 days ago)
  InstallationMedia: Xubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-08-12 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2020-08-12T19:17:45.369468

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