do-release-upgrade and update-manager crashes on migration from ubuntu precise to ubuntu quantal at migration evaluation

Bug #1069007 reported by François LEFÈVRE

This bug report was converted into a question: question #224728: do-release-upgrade and update-manager crashes on migration from ubuntu precise to ubuntu quantal at migration evaluation.

This bug affects 5 people
Affects Status Importance Assigned to Milestone
ubuntu-release-upgrader (Ubuntu)

Bug Description

I have Ubuntu 12.04.01 Precise Pangolin for amd64
At boot, update-manager starts and show "Ubuntu 12.10 Quantal Quetzal is available. Start migration."
I start do-release-upgrade, but it crashed at "Evaluation of changes".
do-release-upgrade is closed, and update-manager starts.
It crashed at update check and show 1608 updates available, and crashes. It shows :
Impossible d'installer certaines mises à jour

Exécutez une mise à niveau partielle pour installer autant de mises à jour que possible.
Ceci peut être dû à une mise à niveau précédente qui n'a pas été terminée.

--------------------------------- ------------
| Mise à niveau partielle | | Fermer |
--------------------------------- -------------
I press the "partial migration" button, but the migration crashed and shows :
Impossible d'évaluer la mise à niveau

Un problème irrémédiable est survenu lors de l'évaluation de la mise à niveau :
E:Impossible de corriger les problèmes, des paquets défectueux sont en mode "garder en l'état"

Cela peut-être du à un paquet logiciel non officiel, non fourni par Ubuntu.

Cela ressemble fort à un problème temporaire. Veuillez réessayer plus tard.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubuntu-release-upgrader-core (not installed)
ProcVersionSignature: Ubuntu 3.5.0-10.10-generic 3.5.1
Uname: Linux 3.5.0-10-generic x86_64
ApportVersion: 2.0.1-0ubuntu14
Architecture: amd64
Date: Sat Oct 20 11:20:37 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to precise on 2012-10-20 (0 days ago)

Revision history for this message
François LEFÈVRE (fanfan54) wrote :
Revision history for this message
Fabio Marconi (fabiomarconi) wrote :

Thank you for taking the time to report this issue and helping to make Ubuntu better. Examining the information you have given us, this does not appear to be a bug report so we are closing it and converting it to a question in the support tracker. We understand the difficulties you are facing, but it is better to raise problems you are having in the support tracker at if you are uncertain if they are bugs. You can also find help posting your problem in the support forum of your local Ubuntu's community or asking at For help on reporting bugs, see

Changed in ubuntu-release-upgrader (Ubuntu):
status: New → Invalid
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