[Bug 1998644] [NEW] Upgrade from 20.04 to 20.10 failed due to non-supported PPAs

[atactic]

Public bug reported:

Don't know how to identify problematic packages and thus how to use ppa-purge.
I have unchecked all lines in 'other software' to disable them but this does not help.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubuntu-release-upgrader-core 1:22.04.15
ProcVersionSignature: Ubuntu 5.15.0-57.63-generic 5.15.74
Uname: Linux 5.15.0-57-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.2
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Dec  2 22:13:26 2022
InstallationDate: Installed on 2022-06-16 (169 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to jammy on 2022-12-02 (0 days ago)
VarLogDistupgradeTermlog:
 
mtime.conffile..etc.update-manager.release-upgrades: 2022-12-02T21:42:03.368376

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


** Tags: amd64 apport-bug dist-upgrade jammy package-from-proposed

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https://bugs.launchpad.net/bugs/1998644

Title:
  Upgrade from 20.04 to 20.10 failed due to non-supported PPAs

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

Bug description:
  Don't know how to identify problematic packages and thus how to use ppa-purge.
  I have unchecked all lines in 'other software' to disable them but this does not help.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.15
  ProcVersionSignature: Ubuntu 5.15.0-57.63-generic 5.15.74
  Uname: Linux 5.15.0-57-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu82.2
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Dec  2 22:13:26 2022
  InstallationDate: Installed on 2022-06-16 (169 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to jammy on 2022-12-02 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2022-12-02T21:42:03.368376

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