Attempting to upgrade from Kubuntu 17.04 to Kubuntu 17.10

[d52fr]

I launched the upgrade from Kubuntu 17.04 to 17.10 with the command-line :
kdesudo "do-release-upgrade -m desktop -f DistUpgradeViewKDE" as indicated on th site : https://help.ubuntu.com/community/ArtfulUpgrades/Kubuntu

System answer in the terminal before asking my credentials :

QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Aucun fichier ou dossier de ce type
QFileSystemWatcher: failed to add paths: /home/dominique/.config/ibus/bus
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon

and after entering my password :
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'

After starting upgrade (downloading files) : the following error message was displayed : impossible d'installer « kubuntu-desktop » (= unable to install "kubuntu-desktop") ...

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: ubuntu-release-upgrader-core 1:17.04.9
ProcVersionSignature: Ubuntu 4.10.0-37.41-generic 4.10.17
Uname: Linux 4.10.0-37-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.5
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Fri Oct 27 18:49:59 2017
InstallationDate: Installed on 2017-09-25 (32 days ago)
InstallationMedia: Kubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to zesty on 2017-10-27 (0 days ago)
VarLogDistupgradeTermlog:

[d52fr (d52fr)]

Final message after upgrading :
dpkg: des problèmes de dépendances empêchent la configuration de kubuntu-desktop :
 kubuntu-desktop dépend de xorg ; cependant :
  Le paquet xorg n'est pas installé.

dpkg: erreur de traitement du paquet kubuntu-desktop (--configure) :
 problèmes de dépendances - laissé non configuré
Des erreurs ont été rencontrées pendant l'exécution :
 kubuntu-desktop
exitMainLoop

Warning : a pop-up appeared declaring : "le système n'a pas pu être mis à niveau" (= unable to upgrade your system)
but another message indicated that the upgrade is completed and inviting me to rebbot.

[d52fr (d52fr)]

At restart, unable to login : I can't type a key in the password field (no keyboard !)