[Bug 1386434] Re: Can't upgrade from trusty.

[ErikBerglund]

After a bit of trial-and-error I uninstalled postgresql. This allowed
the upgrade to continue.

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https://bugs.launchpad.net/bugs/1386434

Title:
  Can't upgrade from trusty.

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Incomplete

Bug description:
  After running: 
  sudo do-release-upgrade

  the upgrade stops with the message:
  >Calculating the changes

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  This can be caused by: 
  * Upgrading to a pre-release version of Ubuntu 
  * Running the current pre-release version of Ubuntu 
  * Unofficial software packages not provided by Ubuntu 

  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. 

  >

  In addition, the bug reporting tool also crashes.

  None of the suggested causes apply. No further information is available.
  --- 
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 14.10
  InstallationDate: Installed on 2012-05-06 (907 days ago)
  InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
  NonfreeKernelModules: nvidia
  Package: ubuntu-release-upgrader (not installed)
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Tags:  utopic dist-upgrade
  Uname: Linux 3.16.0-24-generic x86_64
  UpgradeStatus: Upgraded to utopic on 2014-10-28 (2 days ago)
  UserGroups: adm cdrom dialout dip fuse kismet lpadmin monetdb netdev plugdev sambashare sudo uucp
  _MarkForUpload: True

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