[Bug 2039861] [NEW] Unable to upgrade from LTS to normal release: unresolvable error

[Charles Faulkner]

Public bug reported:

I have recently reinstalled my Ubuntu system using the ISO from 22.04
LTS.  I decided to upgrade from 22.04 LTS to a regular release, so
modified my config to use the normal setting.  I installed all the
current updates and everything that I was requested to do, then
rebooted.

Following the reboot, I opened a terminal and sent "do-release-upgrade".
The system gave me all the information about updating to lunar, and then
proceeded to get all the necessary sources.  Subsequently, the upgrade
failed with the following text:

Checking package manager
Reading package lists... Done    
Building dependency tree... Done 
Reading state information... Done

Calculating the changes

Calculating the changes

Could not determine the upgrade

An unresolvable problem occurred while calculating the upgrade.

If none of this applies, then please report this bug using the 
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If 
you want to investigate this yourself the log files in 
'/var/log/dist-upgrade' will contain details about the upgrade. 
Specifically, look at 'main.log' and 'apt.log'. 


Restoring original system state

Aborting


I have no idea what caused this, and can find no clues within the data generated and collected by the ubuntu-bug application, the data from which is attached to this bug.

Thanks for your help :)

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubuntu-release-upgrader-core 1:22.04.17
ProcVersionSignature: Ubuntu 6.2.0-35.35~22.04.1-generic 6.2.16
Uname: Linux 6.2.0-35-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
CrashReports:
 640:1000:124:21692707:2023-10-18 18:27:39.652267217 +0100:2023-10-18 18:27:40.652267217 +0100:/var/crash/_usr_bin_nautilus.1000.crash
 640:1000:124:57993195:2023-10-19 14:29:25.350192151 +0100:2023-10-19 14:28:50.553713686 +0100:/var/crash/_usr_bin_plasmashell.1000.crash
CurrentDesktop: KDE
Date: Thu Oct 19 15:48:57 2023
InstallationDate: Installed on 2023-10-18 (1 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to jammy on 2023-10-19 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2023-10-19T13:44:33.896170

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


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

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https://bugs.launchpad.net/bugs/2039861

Title:
  Unable to upgrade from LTS to normal release: unresolvable error

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

Bug description:
  I have recently reinstalled my Ubuntu system using the ISO from 22.04
  LTS.  I decided to upgrade from 22.04 LTS to a regular release, so
  modified my config to use the normal setting.  I installed all the
  current updates and everything that I was requested to do, then
  rebooted.

  Following the reboot, I opened a terminal and sent "do-release-
  upgrade".   The system gave me all the information about updating to
  lunar, and then proceeded to get all the necessary sources.
  Subsequently, the upgrade failed with the following text:

  Checking package manager
  Reading package lists... Done    
  Building dependency tree... Done 
  Reading state information... Done

  Calculating the changes

  Calculating the changes

  Could not determine the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If 
  you want to investigate this yourself the log files in 
  '/var/log/dist-upgrade' will contain details about the upgrade. 
  Specifically, look at 'main.log' and 'apt.log'. 

  
  Restoring original system state

  Aborting

  
  I have no idea what caused this, and can find no clues within the data generated and collected by the ubuntu-bug application, the data from which is attached to this bug.

  Thanks for your help :)

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.17
  ProcVersionSignature: Ubuntu 6.2.0-35.35~22.04.1-generic 6.2.16
  Uname: Linux 6.2.0-35-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CrashReports:
   640:1000:124:21692707:2023-10-18 18:27:39.652267217 +0100:2023-10-18 18:27:40.652267217 +0100:/var/crash/_usr_bin_nautilus.1000.crash
   640:1000:124:57993195:2023-10-19 14:29:25.350192151 +0100:2023-10-19 14:28:50.553713686 +0100:/var/crash/_usr_bin_plasmashell.1000.crash
  CurrentDesktop: KDE
  Date: Thu Oct 19 15:48:57 2023
  InstallationDate: Installed on 2023-10-18 (1 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to jammy on 2023-10-19 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2023-10-19T13:44:33.896170

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