[Bug 1916959] Re: Start of LTS upgrade 18.04 to 20.04 failed/aborted

[Olaf Encke]

Ah, kisak-mesa seems to have been the culprit.
After
sudo ppa-purge ppa:kisak/kisak-mesa
the upgrade is now running.

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https://bugs.launchpad.net/bugs/1916959

Title:
  Start of LTS upgrade 18.04 to 20.04 failed/aborted

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

Bug description:
  do-release-upgrade aborted with error:

  "Es konnte nicht ermittelt werden, welche Systemaktualisierungen 
  verfügbar sind 
  Ein unlösbares Problem trat während der Berechnung der 
  Systemaktualisierung auf. 
  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. "

  
  Before that it aborted and told to use ppa-purge, but not which package to purge, so I removed all launchpad/ppa sources from the source list.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 4.15.0-136.140-generic 4.15.18
  Uname: Linux 4.15.0-136-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Feb 25 22:57:24 2021
  InstallationDate: Installed on 2016-04-28 (1764 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 2021-02-25 (0 days ago)
  VarLogDistupgradeTermlog:

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