update fails on lucid to precise - xubuntu - many errors

[jens_we]

i'm trying to upgrade lucid xubuntu to precise and comming from bug 990740

since i've a virtual maschine i can easy revert to a running state (snapshot)

Things i tried:

first via ssh console, than on system console
apt-get update ; apt-get upgrade -y --force-yes ; apt-get dist-upgrade -y
do-release-upgrade

leaves me in non-bootable state (Grub entry is 10.04 but not found...)

i've also tried things mentiond in bug 990740 but it did not help.

so i tried from xfce with update-manager gui and
apt-get -f install after update-manager fails with many errors

apt-get -f install fixes a lot, but leaves that problem:

Entfernen von libxml-libxml-perl ...
/var/lib/dpkg/info/libxml-libxml-perl.prerm: 11: /var/lib/dpkg/info/libxml-libxml-perl.prerm: update-perl-sax-parsers: not found
dpkg: Fehler beim Bearbeiten von libxml-libxml-perl (--remove):
 Unterprozess installiertes pre-removal-Skript gab den Fehlerwert 127 zurück

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.5
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
ApportVersion: 2.0.1-0ubuntu15.1
Architecture: i386
Date: Sun Mar 3 13:47:27 2013
GsettingsChanges:

InstallationMedia:

MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=de
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to precise on 2013-03-03 (0 days ago)

[jens_we (jens-westphal)]

 Sorry, some typo's

1. leaves me in non-bootable state (Grub entry is 12.04 but not found...)

2.

apt-get update ; apt-get upgrade -y --force-yes ; apt-get dist-upgrade -y

reboot the system and

do-release-upgrade

[jens_we (jens-westphal)]

The system boots, but x flickers several on boot, i see a mouse-cursor and console

than it stops on
battery state [OK}

jens