[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.

[Brian Murray]

@malangaman - The release upgrade process works by downloading a tarball
of ubuntu-release-upgrader from the archive for the release of Ubuntu to
which you are going to upgrade. Then that tarball is extracted and the
code ran, so there is no need to download and install the latest version
of ubuntu-release-upgrader as that is done automatically.

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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)

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