[Bug 1875523] Re: I can't upgrade the ubuntu to 20.04 by terminal. Everytime I do it, a message appear saying that it is not possible do the upgrade.

[malangaman]

Please forgive our ignorance but what is the best way to download and install this (1:20.04.22) package?
 It does not show in synaptic.

We cannot upgrade to 20.04 after hours of dealing with this bug. package installed is ubuntu-release-updater-co 1.18.04.44
What is solution?
This did not work for us:
sudo apt remove python-gi
sudo do-release-upgrade -d

Upgrade says An unresolvable problem occurred while calculating the
upgrade.

'/var/log/dist-upgrade' ends with:

2021-05-07 17:16:42,955 INFO failed to remove python-minimal
2021-05-07 17:16:42,955 INFO checking for python-dev (auto_inst=True)
2021-05-07 17:16:42,955 INFO checking for libpython-dev (auto_inst=True)
2021-05-07 17:16:42,955 INFO checking for libpython-stdlib (auto_inst=True)
2021-05-07 17:16:42,955 INFO removing libpython-stdlib because None is being installed
2021-05-07 17:16:42,955 DEBUG Removing 'libpython-stdlib' (None is being installed on the system)
2021-05-07 17:16:42,956 INFO failed to remove libpython-stdlib
2021-05-07 17:16:42,956 INFO checking for libpython-dbg (auto_inst=True)
2021-05-07 17:16:43,614 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
2021-05-07 17:16:43,615 DEBUG abort called

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1875523

Title:
  I can't upgrade the ubuntu to 20.04 by terminal. Everytime I do it, a
  message appear saying that it is not possible do the upgrade.

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader source package in Focal:
  Fix Released

Bug description:
  Impact
  ------
  Some upgrades from Ubuntu 18.04 LTS to Ubuntu 20.04 LTS fail to calculate which prevents people from upgrading to Ubuntu 20.04 LTS.

  Test Case
  ---------
  1) install pyhton-pyside and python-gi on an up to date Ubuntu 18.04 LTS system
  2) run do-release-upgrade -d
  3) Observe the upgrade fail to calculate an upgrade to Ubuntu 20.04 LTS

  To test the version of the dist-upgrader from -proposed you'll need to
  download the dist-upgrade tarball and extract it in to /tmp/. Then run
  sudo ./focal --frontend DistUpgradeViewText.

  Regression Potential
  --------------------
  Given that the release upgrader is replacing python-minimal with python-is-python2 we should ensure that python-is-python2 is installed after the upgrade. We should also test an upgrade from Bionic to Focal which calculated successfully with the existing version of the release upgrader.

  Original Description
  ---------------------
  You look. I can't explain about it in english, but it is here the message. I hope you can understand it.

  Não foi possível calcular a atualização

  Ocorreu um problema sem solução, enquanto estava calculando a
  atualização.

  Isto foi causado por:
  * Atualiza para a versão de pre-lançamento do Ubuntu
  Isto deve de ser provavelmente um problema transitório,
  por favor tente novamente mais tarde.
  Se nada disto servir, então por favor comunique a falha usando o
  comando 'ubuntu-bug ubuntu-release-upgrader-core' no terminal. Se
  você quiser investigar isto por si os ficheiros de registro em
  '/var/log/dist-upgrade' contém detalhes sobre a atualização. Olhe
  especialmente para 'main.log' e 'apt.log'.

  ProblemType: BugDistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.37
  ProcVersionSignature: Ubuntu 5.3.0-47.39~18.04.1-generic 5.3.18
  Uname: Linux 5.3.0-47-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.14
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Apr 27 22:50:59 2020
  PackageArchitecture: allSourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-04-28 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1875523/+subscriptions