Kubuntu 10.04 to 12.04 upgrade fails

[Peter Weidner]

After upgrading Kubuntu from 10.04 to 12.04 my computer did not boot anymore.

- reinstalling GRUB did not solve the problem.
- a fresh install (in dualboot) of Kubuntu 10.04 works. The "upgraded-from-10.04" system still fails. Current Boot-Info: http://pastebin.ubuntu.com/1195049 (sda1 is the fresh install, sda6 is the broken "upgraded-from-10.04" one).

Below, 'apport' information used from the fresh install:

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager (not installed)
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
ApportVersion: 2.0.1-0ubuntu5
Architecture: i386
Date: Mon Sep 10 17:45:09 2012
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
ProcEnviron:
 LANGUAGE=
 TERM=xterm
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)