Public bug reported:
Here are the results of the commands thereunder :
jean-luc@E-4300:~$ lsb_release -rd
Description: Ubuntu 14.04.4 LTS
Release: 14.04
jean-luc@E-4300:~$ apt-cache policy pkgname
N: Impossible de trouver le paquet pkgname
jean-luc@E-4300:~$
Contents of /var/log/dist-upgrade/ in attachment.
The error occurs during the repository configuration phase with the error box :
-------------------------------------------- Start
---------------------------------------------------
Impossible d'évaluer la mise à niveau
Un problème insoluble est survenu lors de la préparation de la mise à
niveau.
Ceci peut-être dû à :
* la mise à niveau vers une version de développement d'Ubuntu ;
* la version de développement d'Ubuntu est actuellement utilisée ;
* des paquets logiciels non officiels, non fournis par Ubuntu.
Si rien de tout cela ne s'applique, veuillez signaler ce bogue en utilisant la
commande « ubuntu-bug ubuntu-release-upgrader-core » dans un terminal.
--------------------------------------------- End
----------------------------------------------------
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-92.139-generic 3.13.11-ckt39
Uname: Linux 3.13.0-92-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CrashDB: ubuntu
Date: Mon Aug 1 23:16:28 2016
InstallationDate: Installed on 2015-10-03 (303 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-08-01 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade third-party-packages trusty
** Attachment added: "Contents of /var/log/dist-upgrade/"
https://bugs.launchpad.net/bugs/1608697/+attachment/4711783/+files/20160801-2323.tar.gz
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https://bugs.launchpad.net/bugs/1608697
Title:
Upgrade from 14.04 to 16.04 fails
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