[Bug 1891793] [NEW] Fail to update from 18.04 LTS to 20.04 LTS

[Davide]

Public bug reported:

I cannot upgrade because of non-official software but I removed every
ppa repository and nothing has changed.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 4.15.0-112.113-generic 4.15.18
Uname: Linux 4.15.0-112-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.16
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 16 10:35:21 2020
InstallationDate: Installed on 2019-04-05 (498 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-08-16 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2020-08-16T10:26:08.339191

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


** Tags: amd64 apport-bug bionic dist-upgrade

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https://bugs.launchpad.net/bugs/1891793

Title:
  Fail to update from 18.04 LTS to 20.04 LTS

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

Bug description:
  I cannot upgrade because of non-official software but I removed every
  ppa repository and nothing has changed.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-112.113-generic 4.15.18
  Uname: Linux 4.15.0-112-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.16
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Aug 16 10:35:21 2020
  InstallationDate: Installed on 2019-04-05 (498 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-08-16 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2020-08-16T10:26:08.339191

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