[Bug 1926367] Re: Unable to update from 18.04 to 20.04

[Brian Murray]

Thanks for taking the time to report this upgrade failure. There is
currently a new version of the release upgrader available in -proposed
which may resolve the error you've encountered. Please run the following
command to test the new version of the upgrader:

  do-release-upgrade -p

Please lets us know the results in this bug report. Thanks again and
good luck!

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

** Tags added: lp-1928397

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https://bugs.launchpad.net/bugs/1926367

Title:
  Unable to update from 18.04 to 20.04

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

Bug description:
  Trying to update an old 18.04 VM and it fails.

  $ lsb_release -rd
  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04

  $ do-release-upgrade
  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [1,554 B]                                                             
  Get:2 Upgrade tool [1,340 kB]                                                                      
  Fetched 1,342 kB in 0s (0 B/s)                                                                     
  authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' 
  extracting 'focal.tar.gz'
  [sudo] password for mpfj: 

  Reading cache

  Checking package manager
  Reading package lists... Done
  Building dependency tree        
  Reading state information... Done
  Hit http://us.archive.ubuntu.com/ubuntu bionic InRelease                                           
  Hit http://security.ubuntu.com/ubuntu bionic-security InRelease                                    
  Hit http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease                                   
  Hit http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease                                 
  Fetched 0 B in 0s (0 B/s)                                                                          
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  Checking for installed snaps

  Calculating snap size requirements

  Updating repository information
  Get:1 http://security.ubuntu.com/ubuntu focal-security InRelease [109 kB]                          
  Hit http://us.archive.ubuntu.com/ubuntu focal InRelease                                            
  Get:2 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages [623 kB]                
  Hit http://us.archive.ubuntu.com/ubuntu focal-updates InRelease                                    
  Hit http://us.archive.ubuntu.com/ubuntu focal-backports InRelease                                  
  Get:3 http://security.ubuntu.com/ubuntu focal-security/main i386 Packages [220 kB]                 
  Get:4 http://security.ubuntu.com/ubuntu focal-security/universe amd64 Packages [555 kB]            
  Get:5 http://security.ubuntu.com/ubuntu focal-security/universe i386 Packages [438 kB]             
  Fetched 1,945 kB in 0s (0 B/s)                                                                     

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

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.44
  ProcVersionSignature: Ubuntu 4.15.0-142.146-generic 4.15.18
  Uname: Linux 4.15.0-142-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity:Unity7:ubuntu
  Date: Tue Apr 27 22:25:14 2021
  InstallationDate: Installed on 2012-06-08 (3245 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-04-27 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2021-04-27T20:27:01.492636

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