[Bug 1915389] [NEW] Release upgrade fails to apply

[Aloïké]

Public bug reported:

I received a notification that a new dist release is available. During
the upgrade process, it fails by telling me that may be caused by ppa
sources.


## What I expected to happen

I expected the upgrade to happen, or to tell me which package fails to
upgrade/causes dependencies troubles.


## What happened instead

The upgrade failed, telling me that may be due to some PPAs and to use
ppa-purge.

But my system "has lived", so I'm not sure on how to find the whole list
of installed PPAs (some have been deleted from apt.sources.d in the
meantime).

---

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

$ apt-cache policy ubuntu-release-upgrader*
ubuntu-release-upgrader-qt:
  Installé : (aucun)
  Candidat : 1:18.04.42
 Table de version :
     1:18.04.42 500
        500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
        500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/universe i386 Packages
     1:18.04.17 500
        500 http://fr.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://fr.archive.ubuntu.com/ubuntu bionic/universe i386 Packages
ubuntu-release-upgrader-core:
  Installé : 1:18.04.42
  Candidat : 1:18.04.42
 Table de version :
 *** 1:18.04.42 500
        500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages
        100 /var/lib/dpkg/status
     1:18.04.17 500
        500 http://fr.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        500 http://fr.archive.ubuntu.com/ubuntu bionic/main i386 Packages
ubuntu-release-upgrader-gtk:
  Installé : 1:18.04.42
  Candidat : 1:18.04.42
 Table de version :
 *** 1:18.04.42 500
        500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages
        100 /var/lib/dpkg/status
     1:18.04.17 500
        500 http://fr.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        500 http://fr.archive.ubuntu.com/ubuntu bionic/main i386 Packages

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.42
ProcVersionSignature: Ubuntu 4.15.0-135.139-generic 4.15.18
Uname: Linux 4.15.0-135-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
Date: Thu Feb 11 11:04:49 2021
InstallationDate: Installed on 2018-01-29 (1108 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-02-11 (0 days ago)

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


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

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1915389

Title:
  Release upgrade fails to apply

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

Bug description:
  I received a notification that a new dist release is available. During
  the upgrade process, it fails by telling me that may be caused by ppa
  sources.

  
  ## What I expected to happen

  I expected the upgrade to happen, or to tell me which package fails to
  upgrade/causes dependencies troubles.

  
  ## What happened instead

  The upgrade failed, telling me that may be due to some PPAs and to use
  ppa-purge.

  But my system "has lived", so I'm not sure on how to find the whole
  list of installed PPAs (some have been deleted from apt.sources.d in
  the meantime).

  ---

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

  $ apt-cache policy ubuntu-release-upgrader*
  ubuntu-release-upgrader-qt:
    Installé : (aucun)
    Candidat : 1:18.04.42
   Table de version :
       1:18.04.42 500
          500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
          500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/universe i386 Packages
       1:18.04.17 500
          500 http://fr.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          500 http://fr.archive.ubuntu.com/ubuntu bionic/universe i386 Packages
  ubuntu-release-upgrader-core:
    Installé : 1:18.04.42
    Candidat : 1:18.04.42
   Table de version :
   *** 1:18.04.42 500
          500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages
          100 /var/lib/dpkg/status
       1:18.04.17 500
          500 http://fr.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          500 http://fr.archive.ubuntu.com/ubuntu bionic/main i386 Packages
  ubuntu-release-upgrader-gtk:
    Installé : 1:18.04.42
    Candidat : 1:18.04.42
   Table de version :
   *** 1:18.04.42 500
          500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          500 http://fr.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages
          100 /var/lib/dpkg/status
       1:18.04.17 500
          500 http://fr.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          500 http://fr.archive.ubuntu.com/ubuntu bionic/main i386 Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 4.15.0-135.139-generic 4.15.18
  Uname: Linux 4.15.0-135-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  Date: Thu Feb 11 11:04:49 2021
  InstallationDate: Installed on 2018-01-29 (1108 days ago)
  InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-02-11 (0 days ago)

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