disttribution upgrade 12.04 --> 14.04

[WingNa]

Message reported: Unresolvable problem occurred while calculating the upgrade.

All PPA's, external packages etc are disabled allright. Even manually doing so upfront does not help.

Tail from /var/log/dist-upgrade/main.log

2014-08-16 12:16:28,364 DEBUG examining: 'deb http://nl.archive.ubuntu.com/ubuntu/ precise-updates multiverse'
2014-08-16 12:16:28,364 DEBUG entry 'deb http://nl.archive.ubuntu.com/ubuntu/ trusty-updates multiverse' updated to new dist
2014-08-16 12:16:28,364 DEBUG examining: 'deb http://archive.canonical.com/ubuntu/ precise partner'
2014-08-16 12:16:28,364 DEBUG entry 'deb http://archive.canonical.com/ubuntu/ trusty partner' updated to new dist
2014-08-16 12:16:28,364 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu/ precise-security main restricted'
2014-08-16 12:16:28,365 DEBUG entry 'deb http://security.ubuntu.com/ubuntu/ trusty-security main restricted' updated to new dist
2014-08-16 12:16:28,365 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu/ precise-security universe'
2014-08-16 12:16:28,365 DEBUG entry 'deb http://security.ubuntu.com/ubuntu/ trusty-security universe' updated to new dist
2014-08-16 12:16:28,365 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu/ precise-security multiverse'
2014-08-16 12:16:28,365 DEBUG entry 'deb http://security.ubuntu.com/ubuntu/ trusty-security multiverse' updated to new dist
2014-08-16 12:16:28,365 DEBUG examining: 'deb http://nl.archive.ubuntu.com/ubuntu/ precise-proposed restricted main multiverse universe'
2014-08-16 12:16:28,365 DEBUG entry 'deb http://nl.archive.ubuntu.com/ubuntu/ trusty-proposed restricted main multiverse universe' updated to new dist
2014-08-16 12:16:28,365 DEBUG examining: 'deb http://extras.ubuntu.com/ubuntu/ precise main'
2014-08-16 12:16:28,365 DEBUG entry 'deb http://extras.ubuntu.com/ubuntu/ trusty main' updated to new dist
2014-08-16 12:16:28,366 DEBUG examining: 'deb http://ppa.launchpad.net/thefanclub/grive-tools/ubuntu precise main'
2014-08-16 12:16:28,369 DEBUG entry '# deb http://ppa.launchpad.net/thefanclub/grive-tools/ubuntu trusty main # uitgeschakeld bij opwaardering naar trusty' was disabled (unknown mirror)
2014-08-16 12:16:28,369 DEBUG examining: 'deb-src http://ppa.launchpad.net/thefanclub/grive-tools/ubuntu precise main'
2014-08-16 12:16:28,372 DEBUG entry '# deb-src http://ppa.launchpad.net/thefanclub/grive-tools/ubuntu trusty main # uitgeschakeld bij opwaardering naar trusty' was disabled (unknown mirror)
2014-08-16 12:16:28,372 DEBUG examining: 'deb http://ppa.launchpad.net/mythbuntu/0.27/ubuntu precise main'
2014-08-16 12:16:28,375 DEBUG entry '# deb http://ppa.launchpad.net/mythbuntu/0.27/ubuntu trusty main # uitgeschakeld bij opwaardering naar trusty' was disabled (unknown mirror)
2014-08-16 12:16:28,375 DEBUG examining: 'deb-src http://ppa.launchpad.net/mythbuntu/0.27/ubuntu precise main'
2014-08-16 12:16:28,378 DEBUG entry '# deb-src http://ppa.launchpad.net/mythbuntu/0.27/ubuntu trusty main # uitgeschakeld bij opwaardering naar trusty' was disabled (unknown mirror)
2014-08-16 12:16:28,378 DEBUG examining: 'deb http://ppa.launchpad.net/tualatrix/ppa/ubuntu precise main'
2014-08-16 12:16:28,381 DEBUG entry '# deb http://ppa.launchpad.net/tualatrix/ppa/ubuntu trusty main # uitgeschakeld bij opwaardering naar trusty' was disabled (unknown mirror)
2014-08-16 12:16:28,381 DEBUG examining: 'deb-src http://ppa.launchpad.net/tualatrix/ppa/ubuntu precise main'
2014-08-16 12:16:28,384 DEBUG entry '# deb-src http://ppa.launchpad.net/tualatrix/ppa/ubuntu trusty main # uitgeschakeld bij opwaardering naar trusty' was disabled (unknown mirror)
2014-08-16 12:16:28,384 DEBUG examining: 'deb http://dl.google.com/linux/talkplugin/deb/ stable main'
2014-08-16 12:16:28,387 DEBUG entry '# deb http://dl.google.com/linux/talkplugin/deb/ stable main # uitgeschakeld bij opwaardering naar trusty' was disabled (unknown mirror)
2014-08-16 12:16:28,387 DEBUG examining: 'deb http://dl.google.com/linux/earth/deb/ stable main'
2014-08-16 12:16:28,390 DEBUG entry '# deb http://dl.google.com/linux/earth/deb/ stable main # uitgeschakeld bij opwaardering naar trusty' was disabled (unknown mirror)
2014-08-16 12:16:31,009 DEBUG running doUpdate() (showErrors=True)
2014-08-16 12:16:50,430 DEBUG openCache()
2014-08-16 12:16:50,431 DEBUG failed to SystemUnLock() (E:Niet vergrendeld)
2014-08-16 12:17:01,851 DEBUG /openCache(), new cache size 46264
2014-08-16 12:17:01,851 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'kubuntu-desktop')
(END)

During reporting this error, Apport KDE repeatedly crashes too.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.17
ProcVersionSignature: Ubuntu 3.2.0-67.101-generic 3.2.60
Uname: Linux 3.2.0-67-generic i686
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
Date: Sat Aug 16 12:20:58 2014
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1408042653
 com.ubuntu.update-manager remind-reload false
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=
 TERM=xterm
 PATH=(custom, no user)
 LANG=nl_NL.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2014-08-16 (0 days ago)
VarLogDistupgradeTermlog:

[WingNa (bollen-w)]

UPDATE:

Removing all *flightgear* packages and anything related/depending on them, solved this problem.

The upgrade 12.04.3 to 14.04 did work, in 1 go.

[WingNa (bollen-w)]

After removing all packages containing the word *flightgear*, the upgrade from 12.04.3 to 14.04 worked well, in 1 go.