[Bug 2010455] [NEW] Unable to determine upgrade 20.04 -> 22.04

[Lukasz Dudziak]

Public bug reported:

After cleaning PPAs, trying my best to remove any alternative versions of packages, upgrading all packages etc. I'm still unable to upgrade to 22.04 from 20.04.
I'm not sure how to interpret information in the apt.log file - the broken packages all seem to be coming from the official focal, focal-updates etc. (checked most of them using apt-cache).
I would appreciate any help.

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
Date: Fri Mar 10 16:29:21 2023
InstallationDate: Installed on 2018-07-19 (1695 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2023-03-10 (0 days ago)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade focal

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https://bugs.launchpad.net/bugs/2010455

Title:
  Unable to determine upgrade 20.04 -> 22.04

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

Bug description:
  After cleaning PPAs, trying my best to remove any alternative versions of packages, upgrading all packages etc. I'm still unable to upgrade to 22.04 from 20.04.
  I'm not sure how to interpret information in the apt.log file - the broken packages all seem to be coming from the official focal, focal-updates etc. (checked most of them using apt-cache).
  I would appreciate any help.

  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
  Date: Fri Mar 10 16:29:21 2023
  InstallationDate: Installed on 2018-07-19 (1695 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2023-03-10 (0 days ago)

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