[Bug 2150267] Re: Unable to upgrade 24.04 LTS Desktop to 26.04 Desktop

[Daniel Tang]

*** This bug is a duplicate of bug 2150319 ***
    https://bugs.launchpad.net/bugs/2150319

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

** This bug has been marked a duplicate of bug 2150319
   lintian breaks upgrade from 24.04 to 26.04

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https://bugs.launchpad.net/bugs/2150267

Title:
  Unable to upgrade 24.04 LTS Desktop to 26.04 Desktop

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

Bug description:
  I have done the following prior to update:
  sudo apt update
  sudo apt upgrade -y
  sudo apt install update-manager-core
  sudo nano /etc/update-manager/release-upgrades //made sure "Prompt=lts"
  sudo do-release-upgrade --devel-release //since LTS seems to be unavailable
  sudo do-release-upgrade

  Installed package headers were downloaded from repositories and snaps
  were analyzed:

  "Checking for installed snaps

  Calculating snap size requirements"

  Then:

  "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.

  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
  Reading package lists... Done    
  Building dependency tree... Done 
  Reading state information... Done"

  There appears to be several "Broken" dependencies but running:

  "Starting pkgProblemResolver with broken count: 12
  Starting 2 pkgProblemResolver with broken count: 12"

  So I tried fixing them with:

  "sudo apt --fix-broken install"

  and:

  "sudo dpkg --configure -a"

  Re-run the upgraded but same error and log report. I even tried using
  Synaptic to locate broken dependencies with no luck.

  Help!!

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: ubuntu-release-upgrader-core 1:24.04.28
  ProcVersionSignature: Ubuntu 6.17.0-22.22~24.04.1-generic 6.17.13
  Uname: Linux 6.17.0-22-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Apr 24 11:42:27 2026
  InstallationDate: Installed on 2026-01-03 (111 days ago)
  InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 (20250805.1)
  PackageArchitecture: all
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to noble on 2026-04-24 (0 days ago)
  VarLogDistupgradeAptHistorylog:
   Start-Date: 2026-04-24  11:36:39
   Requested-By: aldrin (1000)
   End-Date: 2026-04-24  11:36:39
  VarLogDistupgradeApttermlog:
   Log started: 2026-04-24  11:36:39
   Log ended: 2026-04-24  11:36:39

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