[Bug 2154622] [NEW] Trying to upgrade from 24.04 LTS to 26.04 LTS and failing to calculate the upgrade

[Dodgy Gadget]

Public bug reported:

Updating repository information
Hit http://au.archive.ubuntu.com/ubuntu resolute InRelease                                                                                          
Hit http://au.archive.ubuntu.com/ubuntu resolute-updates InRelease                                                                                  
Hit http://au.archive.ubuntu.com/ubuntu resolute-backports InRelease                                                                                
Hit http://security.ubuntu.com/ubuntu resolute-security InRelease                                                                                   
Fetched 0 B in 0s (0 B/s)                                                                                                                           

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

Calculating the changes

Calculating the changes

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.


❯ lsb_release -rd
No LSB modules are available.
Description:	Ubuntu 24.04.4 LTS
Release:	24.04
 
I expect to be able to upgrade my system - instead it failed with the above error
.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: ubuntu-release-upgrader-core 1:24.04.28
ProcVersionSignature: Ubuntu 6.17.0-29.29~24.04.1-generic 6.17.13
Uname: Linux 6.17.0-29-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
CrashReports:
 640:1000:109:44666990:2026-05-25 22:01:52.607094049 +1000:2026-05-25 22:01:53.607094049 +1000:/var/crash/_usr_bin_thunar.1000.crash
 640:1000:109:134743:2026-05-27 17:19:29.554630756 +1000:2026-05-27 17:19:30.554630756 +1000:/var/crash/_opt_docker-desktop_Docker Desktop.1000.crash
CurrentDesktop: ubuntu:GNOME
Date: Sat May 30 15:55:22 2026
InstallationDate: Installed on 2025-11-10 (201 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 (20250805.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to noble on 2026-05-30 (0 days ago)
VarLogDistupgradeAptHistorylog:
 Start-Date: 2026-05-30  15:52:44
 Requested-By: gadget (1000)
 End-Date: 2026-05-30  15:52:44
VarLogDistupgradeApttermlog:
 Log started: 2026-05-30  15:52:44
 Log ended: 2026-05-30  15:52:44

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


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

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https://bugs.launchpad.net/bugs/2154622

Title:
  Trying to upgrade from 24.04 LTS to 26.04 LTS and failing to calculate
  the upgrade

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

Bug description:
  Updating repository information
  Hit http://au.archive.ubuntu.com/ubuntu resolute InRelease                                                                                          
  Hit http://au.archive.ubuntu.com/ubuntu resolute-updates InRelease                                                                                  
  Hit http://au.archive.ubuntu.com/ubuntu resolute-backports InRelease                                                                                
  Hit http://security.ubuntu.com/ubuntu resolute-security InRelease                                                                                   
  Fetched 0 B in 0s (0 B/s)                                                                                                                           

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

  Calculating the changes

  Calculating the changes

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  
  ❯ lsb_release -rd
  No LSB modules are available.
  Description:	Ubuntu 24.04.4 LTS
  Release:	24.04
   
  I expect to be able to upgrade my system - instead it failed with the above error
  .

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: ubuntu-release-upgrader-core 1:24.04.28
  ProcVersionSignature: Ubuntu 6.17.0-29.29~24.04.1-generic 6.17.13
  Uname: Linux 6.17.0-29-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CrashReports:
   640:1000:109:44666990:2026-05-25 22:01:52.607094049 +1000:2026-05-25 22:01:53.607094049 +1000:/var/crash/_usr_bin_thunar.1000.crash
   640:1000:109:134743:2026-05-27 17:19:29.554630756 +1000:2026-05-27 17:19:30.554630756 +1000:/var/crash/_opt_docker-desktop_Docker Desktop.1000.crash
  CurrentDesktop: ubuntu:GNOME
  Date: Sat May 30 15:55:22 2026
  InstallationDate: Installed on 2025-11-10 (201 days ago)
  InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 (20250805.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to noble on 2026-05-30 (0 days ago)
  VarLogDistupgradeAptHistorylog:
   Start-Date: 2026-05-30  15:52:44
   Requested-By: gadget (1000)
   End-Date: 2026-05-30  15:52:44
  VarLogDistupgradeApttermlog:
   Log started: 2026-05-30  15:52:44
   Log ended: 2026-05-30  15:52:44

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