[Bug 974400] Re: Impossible to upgrade to 12.4 from Kubuntu 11.10

[Olivier - interfaSys]

And this is from the logs:
2012-04-05 16:59:53,748 DEBUG running doUpdate() (showErrors=True)
2012-04-05 16:59:55,152 DEBUG openCache()
2012-04-05 16:59:55,152 DEBUG failed to SystemUnLock() (E:Not locked) 
2012-04-05 16:59:59,165 DEBUG /openCache(), new cache size 58577
2012-04-05 16:59:59,165 DEBUG needServerMode(): run in 'desktop' mode, (because of pkg 'kubuntu-desktop')
2012-04-05 17:10:06,145 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'

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https://bugs.launchpad.net/bugs/974400

Title:
  Impossible to upgrade to 12.4 from Kubuntu 11.10

Status in “update-manager” package in Ubuntu:
  Incomplete

Bug description:
  I typed "kubuntu-devel-release-upgrade"
  It failed with "Could not determine the upgrade"

  $ lsb_release -rd
  Description:    Ubuntu 11.10
  Release:        11.10

  My apt sources
  deb http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric main restricted 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric main restricted 
  deb http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-updates main restricted 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-updates main restricted 
  deb http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric universe 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric universe 
  deb http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-updates universe 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-updates universe 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric multiverse 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-updates multiverse 
  deb http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-security main restricted 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-security main restricted 
  deb http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-security universe 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-security universe 
  deb http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-security multiverse 
  deb-src http://mirror.switch.ch/ftp/mirror/ubuntu/ oneiric-security multiverse 
  deb http://archive.canonical.com/ubuntu/ oneiric partner 
  deb-src http://archive.canonical.com/ubuntu/ oneiric partner 
  deb http://extras.ubuntu.com/ubuntu/ oneiric main 
  deb-src http://extras.ubuntu.com/ubuntu/ oneiric main

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