[Bug 1894962] [NEW] Could not calculate the upgrade

[Alexander]

Public bug reported:

Upgrade from Ubuntu Mate 18.04.5 -> 20.04 via "Software Updater" or what is called by it later.
At first, calculation failed with reported suspicion on unofficial Ubuntu repositories (Launchpad). I've removed those via "Software&Updates". I've cleaned up sources.list.d from those, because upgrader had once restored repositories at "Other Software" tab after next failed upgrade. I've deleted keys for those repositories. I can't tell, if the latter was mandatory.
Upgrader hadn't stop failing. Same suspicion. I've switched off all repositories listed at "Other Software" tab. Now upgrader fails with no hint.

Description:	Ubuntu 18.04.5 LTS
Release:	18.04

$ apt-cache policy ubuntu-release-upgrader
N: Unable to locate package ubuntu-release-upgrader

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 4.15.0-117.118-generic 4.15.18
Uname: Linux 4.15.0-117-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: MATE
Date: Wed Sep  9 10:59:07 2020
InstallationDate: Installed on 2016-10-27 (1412 days ago)
InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-09-09 (0 days ago)
VarLogDistupgradeTermlog:

mtime.conffile..etc.update-manager.release-upgrades:
2020-09-09T09:18:30.128932

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


** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages

** Attachment added: "main.log"
   https://bugs.launchpad.net/bugs/1894962/+attachment/5408926/+files/main.log

** Description changed:

  Upgrade from Ubuntu Mate 18.04.5 -> 20.04 via "Software Updater" or what is called by it later.
- At first, calculation failed with reported suspicion on unofficial Ubuntu repositories (Launchpad). I've removed those via "Software&Updates". I've cleaned up sources.list.d from those, because upgrader had once restored repositories "Other Software" tab after next failed upgrade. I've deleted keys for those repositories. I can't tell, if the letter was mandatory.
+ At first, calculation failed with reported suspicion on unofficial Ubuntu repositories (Launchpad). I've removed those via "Software&Updates". I've cleaned up sources.list.d from those, because upgrader had once restored repositories at "Other Software" tab after next failed upgrade. I've deleted keys for those repositories. I can't tell, if the letter was mandatory.
  Upgrader hadn't stop failing. Same suspicion. I've switched off all repositories listed at "Other Software" tab. Now upgrader fails with no hint.
  
  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04
  
  $ apt-cache policy ubuntu-release-upgrader
  N: Unable to locate package ubuntu-release-upgrader
- (see main.log)
  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-117.118-generic 4.15.18
  Uname: Linux 4.15.0-117-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Wed Sep  9 10:59:07 2020
  InstallationDate: Installed on 2016-10-27 (1412 days ago)
  InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-09 (0 days ago)
  VarLogDistupgradeTermlog:
-  
- mtime.conffile..etc.update-manager.release-upgrades: 2020-09-09T09:18:30.128932
+ 
+ mtime.conffile..etc.update-manager.release-upgrades:
+ 2020-09-09T09:18:30.128932

** Description changed:

  Upgrade from Ubuntu Mate 18.04.5 -> 20.04 via "Software Updater" or what is called by it later.
- At first, calculation failed with reported suspicion on unofficial Ubuntu repositories (Launchpad). I've removed those via "Software&Updates". I've cleaned up sources.list.d from those, because upgrader had once restored repositories at "Other Software" tab after next failed upgrade. I've deleted keys for those repositories. I can't tell, if the letter was mandatory.
+ At first, calculation failed with reported suspicion on unofficial Ubuntu repositories (Launchpad). I've removed those via "Software&Updates". I've cleaned up sources.list.d from those, because upgrader had once restored repositories at "Other Software" tab after next failed upgrade. I've deleted keys for those repositories. I can't tell, if the latter was mandatory.
  Upgrader hadn't stop failing. Same suspicion. I've switched off all repositories listed at "Other Software" tab. Now upgrader fails with no hint.
  
  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04
  
  $ apt-cache policy ubuntu-release-upgrader
  N: Unable to locate package ubuntu-release-upgrader
  
  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-117.118-generic 4.15.18
  Uname: Linux 4.15.0-117-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Wed Sep  9 10:59:07 2020
  InstallationDate: Installed on 2016-10-27 (1412 days ago)
  InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-09 (0 days ago)
  VarLogDistupgradeTermlog:
  
  mtime.conffile..etc.update-manager.release-upgrades:
  2020-09-09T09:18:30.128932

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https://bugs.launchpad.net/bugs/1894962

Title:
  Could not calculate the upgrade

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

Bug description:
  Upgrade from Ubuntu Mate 18.04.5 -> 20.04 via "Software Updater" or what is called by it later.
  At first, calculation failed with reported suspicion on unofficial Ubuntu repositories (Launchpad). I've removed those via "Software&Updates". I've cleaned up sources.list.d from those, because upgrader had once restored repositories at "Other Software" tab after next failed upgrade. I've deleted keys for those repositories. I can't tell, if the latter was mandatory.
  Upgrader hadn't stop failing. Same suspicion. I've switched off all repositories listed at "Other Software" tab. Now upgrader fails with no hint.

  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04

  $ apt-cache policy ubuntu-release-upgrader
  N: Unable to locate package ubuntu-release-upgrader

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-117.118-generic 4.15.18
  Uname: Linux 4.15.0-117-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Wed Sep  9 10:59:07 2020
  InstallationDate: Installed on 2016-10-27 (1412 days ago)
  InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-09 (0 days ago)
  VarLogDistupgradeTermlog:

  mtime.conffile..etc.update-manager.release-upgrades:
  2020-09-09T09:18:30.128932

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