[Bug 1986637] Re: An unresolvable problem occurred while calculating the upgrade. This was likely caused by: * Unofficial software packages not provided by Ubuntu Please use the tool 'ppa-purge' from the ppa-purge package to remove software from a Launchpad PPA and try the upgrade again.

[Nick Rosbrook]

*** This bug is a duplicate of bug 1970018 ***
    https://bugs.launchpad.net/bugs/1970018

Reviewing the files from your upgrade attempt, you have installed
packages from the deadsnakes PPA. Some of the packages installed are
newer than those in the official archive, which is keeping some python
packages installed which then prevents the upgrade from being
calculated. Please try using the ppa-purge tool to remove packages
installed from ppa:deadsnakes/ppa. 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: deadsnakes-ppa

** This bug has been marked a duplicate of bug 1970018
   Cannot upgrade to ubuntu 21.10 from ubuntu 20.04.

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https://bugs.launchpad.net/bugs/1986637

Title:
  An unresolvable problem occurred while calculating the upgrade.   This
  was likely caused by:  * Unofficial software packages not provided by
  Ubuntu  Please use the tool 'ppa-purge' from the ppa-purge  package to
  remove software from a Launchpad PPA and  try the upgrade again.

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

Bug description:
  upgrade from 20.04.3 lts to 22.04.1

  2022-08-16 10:35:03,549 INFO installing linux metapackage: linux-generic
  2022-08-16 10:35:03,549 DEBUG Installing 'linux-generic' (linux metapackage may have been accidentally uninstalled)
  2022-08-16 10:35:03,577 DEBUG Marking 'ubuntu-desktop' for upgrade
  2022-08-16 10:35:03,802 WARNING Can't mark 'ubuntu-desktop' for upgrade (E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.)
  2022-08-16 10:35:04,165 ERROR Dist-upgrade failed: 'Broken packages after upgrade: gnome-control-center, gnome-shell, libgirepository-1.0-1, ubuntu-desktop'
  2022-08-16 10:35:04,182 DEBUG abort called
  2022-08-16 10:35:04,183 DEBUG openCache()
  2022-08-16 10:35:06,430 DEBUG Comparing 5.13.0-52 with 
  2022-08-16 10:35:06,431 DEBUG Comparing 5.15.0-46 with 5.13.0-52
  2022-08-16 10:35:06,559 DEBUG /openCache(), new cache size 71881
  (main.log)

    MarkDelete gnome-todo:amd64 < 3.28.1-5 | 3.28.1-6ubuntu1 @ii umH Ib > FU=0
  Investigating (9) gnome-calendar:amd64 < 3.36.2-0ubuntu1 -> 41.2-3 @ii umU Ib >
  Broken gnome-calendar:amd64 Depends on libgweather-3-16:amd64 < 3.36.1-1~ubuntu20.04.1 | 40.0-5build1 @ii umH > (>= 40.0)
    Considering libgweather-3-16:amd64 20 as a solution to gnome-calendar:amd64 1
    MarkKeep gnome-calendar:amd64 < 3.36.2-0ubuntu1 -> 41.2-3 @ii umU Ib > FU=0
    Holding Back gnome-calendar:amd64 rather than change libgweather-3-16:amd64
   Try to Re-Instate (9) mutter:amd64
    MarkKeep mutter:amd64 < 3.36.9-0ubuntu0.20.04.2 -> 42.2-0ubuntu1 @ii umU Ib > FU=0
  Done
  Log time: 2022-08-16 10:35:06.539338
  (apt.log)

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.38
  ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
  Uname: Linux 5.15.0-46-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.24
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Aug 16 10:49:36 2022
  InstallationDate: Installed on 2022-04-16 (121 days ago)
  InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2022-08-16 (0 days ago)

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