[Bug 1901399] Re: Ubuntu failed to upgrade from Ubuntu 20.04 LTS to 20.10

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

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

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https://bugs.launchpad.net/bugs/1901399

Title:
  Ubuntu failed to upgrade from Ubuntu 20.04 LTS to 20.10

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

Bug description:
  This is the output of the terminal when I tried to upgrade from Ubuntu
  20.04 LTS to Ubuntu 20.10:

  $sudo do-release-upgrade

  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [819 B]                                           
  Get:2 Upgrade tool [1.338 kB]                                                  
  Fetched 1.339 kB in 0s (0 B/s)                                                 
  authenticate 'groovy.tar.gz' against 'groovy.tar.gz.gpg' 
  extracting 'groovy.tar.gz'

  Reading cache

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

  Livepatch security updates are not available for Ubuntu 20.10. If you 
  upgrade, Livepatch will turn off. 

  Continue [yN] y
  Hit https://dl.google.com/linux/chrome/deb stable InRelease                    
  Hit http://archive.canonical.com/ubuntu focal InRelease                        
  Ign https://dl.google.com/linux/earth/deb stable InRelease                     
  Hit https://dl.google.com/linux/earth/deb stable Release                       
  Hit https://updates.signal.org/desktop/apt xenial InRelease                    
  Hit https://packages.microsoft.com/ubuntu/20.04/prod focal InRelease           
  Get:1 http://mirrors.ubuntu.com/mirrors.txt Mirrorlist [373 B]                 
  Hit http://mirror.ufscar.br/ubuntu focal-updates InRelease                     
  Hit http://repositorio.nti.ufal.br/ubuntu focal-security InRelease             
  Hit http://ubuntu-archive.locaweb.com.br/ubuntu focal InRelease                
  Hit http://archive.ubuntu.com/ubuntu focal-backports InRelease                 
  Fetched 373 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

  Third party sources disabled

  Some third party entries in your sources.list were disabled. You can 
  re-enable them after the upgrade with the 'software-properties' tool 
  or your package manager. 

  To continue please press [ENTER]

  Get:1 http://archive.canonical.com/ubuntu groovy InRelease [11,4 kB]           
  Get:2 http://archive.canonical.com/ubuntu groovy/partner amd64 Packages [1.292 B]
  Get:3 http://archive.canonical.com/ubuntu groovy/partner Translation-en [540 B]
  Fetched 13,2 kB in 0s (0 B/s)                                                  

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

  Invalid package information

  After updating your package information, the essential package 
  'ubuntu-minimal' could not be located. This may be because you have 
  no official mirrors listed in your software sources, or because of 
  excessive load on the mirror you are using. See /etc/apt/sources.list 
  for the current list of configured software sources. 
  In the case of an overloaded mirror, you may want to try the upgrade 
  again later. 

  
  Restoring original system state

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

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.28
  ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
  Uname: Linux 5.4.0-52-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.10
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Sun Oct 25 08:36:33 2020
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2020-10-25 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2020-10-25 08:36:13.201648
   Log time: 2020-10-25 08:36:17.314341
   Log time: 2020-10-25 08:36:32.886024
   Log time: 2020-10-25 08:36:34.697674
  mtime.conffile..etc.update-manager.release-upgrades: 2020-10-25T08:19:53.203973

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