[Bug 1988350] [NEW] Impossible to upgrade from Ubuntu 20.04 LTS to 22.04 LTS

[Christophe Bourez]

Public bug reported:

do-release-upgrade failed to upgrade with

Calculating the changes

Could not determine the upgrade

An unresolvable problem occurred while calculating the upgrade.

This was likely caused by: 
* Unofficial software packages not provided by Ubuntu 
Please use the tool 'ppa-purge' from the ppa-purge 
package to remove software from a Launchpad PPA and 
try the upgrade again. 

But there are no ppa to purge.

/var/log/dist-upgrade/main.log reports the following messages
2022-08-31 22:43:33,596 DEBUG Marking 'ubuntu-desktop' for upgrade
2022-08-31 22:43:33,727 WARNING Can't mark 'ubuntu-desktop' for upgrade (E:Unable to correct problems, you have held broken packages.)
2022-08-31 22:43:33,951 ERROR Dist-upgrade failed: 'Broken packages after upgrade: ubuntu-desktop'

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.39
ProcVersionSignature: Ubuntu 5.4.0-125.141-generic 5.4.195
Uname: Linux 5.4.0-125-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 31 22:45:49 2022
InstallationDate: Installed on 2017-05-10 (1939 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 2022-08-31 (0 days ago)
modified.conffile..etc.default.apport:
 # set this to 0 to disable apport, or to 1 to enable it
 # you can temporarily override this with
 # sudo service apport start force_start=1
 enabled=0
mtime.conffile..etc.default.apport: 2019-09-19T09:41:24.044078

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


** Tags: amd64 apport-bug dist-upgrade focal third-party-packages

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https://bugs.launchpad.net/bugs/1988350

Title:
  Impossible to upgrade from Ubuntu 20.04 LTS to 22.04 LTS

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

Bug description:
  do-release-upgrade failed to upgrade with

  Calculating the changes

  Could not determine the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  This was likely caused by: 
  * Unofficial software packages not provided by Ubuntu 
  Please use the tool 'ppa-purge' from the ppa-purge 
  package to remove software from a Launchpad PPA and 
  try the upgrade again. 

  But there are no ppa to purge.

  /var/log/dist-upgrade/main.log reports the following messages
  2022-08-31 22:43:33,596 DEBUG Marking 'ubuntu-desktop' for upgrade
  2022-08-31 22:43:33,727 WARNING Can't mark 'ubuntu-desktop' for upgrade (E:Unable to correct problems, you have held broken packages.)
  2022-08-31 22:43:33,951 ERROR Dist-upgrade failed: 'Broken packages after upgrade: ubuntu-desktop'

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.39
  ProcVersionSignature: Ubuntu 5.4.0-125.141-generic 5.4.195
  Uname: Linux 5.4.0-125-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.24
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Aug 31 22:45:49 2022
  InstallationDate: Installed on 2017-05-10 (1939 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 2022-08-31 (0 days ago)
  modified.conffile..etc.default.apport:
   # set this to 0 to disable apport, or to 1 to enable it
   # you can temporarily override this with
   # sudo service apport start force_start=1
   enabled=0
  mtime.conffile..etc.default.apport: 2019-09-19T09:41:24.044078

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