[Bug 2151336] Re: An unresolvable problem occurred while calculating the upgrade

[Simon Johnsson]

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

** 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/2151336

Title:
  An unresolvable problem occurred while calculating the upgrade

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

Bug description:
  Get:1 Upgrade tool signature [833 B]                                                                             
  Get:2 Upgrade tool [950 kB]                                                                                      
  Fetched 951 kB in 0s (0 B/s)                                                                                     
  /usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py:237: Warning: W:Download is performed unsandboxed as root as file 'resolute.tar.gz.gpg' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
    result = fetcher.run()
  authenticate 'resolute.tar.gz' against 'resolute.tar.gz.gpg' 
  extracting 'resolute.tar.gz'

  Reading cache

  Checking package manager
  Reading package lists... Done
  Building dependency tree... Done
  Reading state information... Done
  Hit http://security.ubuntu.com/ubuntu noble-security InRelease                                                   
  Hit http://us.archive.ubuntu.com/ubuntu noble InRelease                                                          
  Hit http://us.archive.ubuntu.com/ubuntu noble-updates InRelease                                                  
  Hit http://us.archive.ubuntu.com/ubuntu noble-backports InRelease                                                
  Hit https://esm.ubuntu.com/apps/ubuntu noble-apps-security InRelease                                             
  Hit https://ppa.launchpadcontent.net/ubuntuhandbook1/rawtherapee/ubuntu noble InRelease                          
  Hit https://esm.ubuntu.com/apps/ubuntu noble-apps-updates InRelease                                              
  Hit https://esm.ubuntu.com/infra/ubuntu noble-infra-updates InRelease                                            
  Hit https://esm.ubuntu.com/infra/ubuntu noble-infra-security InRelease                                           
  Fetched 0 B in 0s (0 B/s)                                                                                        
  Reading package lists... Done    
  Building dependency tree... Done 
  Reading state information... Done

  Checking for installed snaps

  Calculating snap size requirements

  Updating repository information
  Hit http://security.ubuntu.com/ubuntu resolute-security InRelease                                                
  Hit http://us.archive.ubuntu.com/ubuntu resolute InRelease                                                       
  Hit http://us.archive.ubuntu.com/ubuntu resolute-updates InRelease                                               
  Hit http://us.archive.ubuntu.com/ubuntu resolute-backports InRelease                                             
  Hit https://esm.ubuntu.com/apps/ubuntu resolute-apps-updates InRelease                                           
  Hit https://esm.ubuntu.com/apps/ubuntu resolute-apps-security InRelease                                          
  Hit https://esm.ubuntu.com/infra/ubuntu resolute-infra-updates InRelease                                         
  Hit https://esm.ubuntu.com/infra/ubuntu resolute-infra-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.

  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

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: ubuntu-release-upgrader-core 1:24.04.28
  ProcVersionSignature: Ubuntu 6.8.0-111.111-generic 6.8.12
  Uname: Linux 6.8.0-111-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3.8
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Wed May  6 10:05:47 2026
  InstallationDate: Installed on 2020-10-13 (2031 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  PackageArchitecture: all
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/usr/bin/zsh
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to noble on 2026-05-06 (0 days ago)

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