[Bug 1893510] Re: ubuntu upgrade from 18.04 to 20.04 fails due to dependency collision

[Brian Murray]

Reviewing the files from your upgrade attempt you seem to have enabled a
PPA that provides Xorg and python packages. This will prevent the
upgrade as that PPA contains packages which generate failures when
trying to calculate the upgrade. You can revert the PPA by installing
the ppa-purge package from the official Ubuntu archive and then running
'sudo ppa-purge ppa:oibaf/graphics-drivers'.  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: ppa xorg-oibaf-ppa

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https://bugs.launchpad.net/bugs/1893510

Title:
  ubuntu upgrade from 18.04 to 20.04 fails due to dependency collision

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

Bug description:
  When trying to upgrade to 20.04 via

  $ sudo do-release-upgrade -d'

  the process aborts while calculating dependencies. The first error I
  can spot in /var/log/dist-upgrade/main.log is

  ERROR Dist-upgrade failed: 'Broken packages after upgrade: colord'

  but I am unsure how to dig deeper to find out what exactly is going
  wrong here. Does someone have a hint where to look next?

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-115.116-generic 4.15.18
  Uname: Linux 4.15.0-115-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Aug 29 11:45:50 2020
  InstallationDate: Installed on 2014-05-16 (2296 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  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 2020-08-29 (0 days ago)

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