[Bug 2009861] Re: do-release-upgrade fails when upgrading to 22.04 "An unresolvable problem occurred"

[Luca Hermes]

I found several hints that this should be posted as a question - I am
unsure that this is a bug

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

** Converted to question:
   https://answers.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+question/705782

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https://bugs.launchpad.net/bugs/2009861

Title:
  do-release-upgrade fails when upgrading to 22.04 "An unresolvable
  problem occurred"

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

Bug description:
  I'm trying to upgrade my system from Ubuntu version 20.04 to 22.04 via
  `do-release-upgrade`. The command fails with "An unresolvable problem
  occurred while calculating the upgrade."

  I did some research and found that external software sources may be
  the issue, but I can't figure out which ones are causing the issue for
  me. Any help is greatly appreciated.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.40
  ProcVersionSignature: Ubuntu 5.4.0-144.161-generic 5.4.229
  Uname: Linux 5.4.0-144-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.25
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: Unity:Unity7:ubuntu
  Date: Thu Mar  9 16:37:02 2023
  InstallationDate: Installed on 2017-06-11 (2096 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2023-03-09 (0 days ago)

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