[Bug 1364927] Re: Cannot upgrade from 12.04 to 14.04

[robin]

*** This bug is a duplicate of bug 1356142 ***
    https://bugs.launchpad.net/bugs/1356142

** This bug has been marked a duplicate of bug 1361385
   dist-upgrade to 14.04 failed

** This bug is no longer a duplicate of bug 1357948
   Could not calculate the upgrade
** This bug has been marked a duplicate of bug 1361496
   With the Upgrading Ubuntu 12.04 64bit on 14.04 there comes mistake: It could not be determined which system actualizations are available

** This bug is no longer a duplicate of bug 1361385
   dist-upgrade to 14.04 failed
** This bug has been marked a duplicate of bug 1357948
   Could not calculate the upgrade

** This bug is no longer a duplicate of bug 1361496
   With the Upgrading Ubuntu 12.04 64bit on 14.04 there comes mistake: It could not be determined which system actualizations are available
** This bug has been marked a duplicate of bug 1362725
   trying to update from 12.04 to 14.04 and it crashes

** This bug is no longer a duplicate of bug 1362725
   trying to update from 12.04 to 14.04 and it crashes
** This bug has been marked a duplicate of bug 1356142
   not able to upgrade from 12.4 to 14.4

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https://bugs.launchpad.net/bugs/1364927

Title:
  Cannot upgrade from 12.04 to 14.04

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

Bug description:
  Trying to upgrade from 12.04 to 14.04, but it will not let me:

  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done
  Building data structures... Done 

  Calculating the changes

  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. 

  
  Restoring original system state

  Aborting
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done
  Building data structures... Done 

  Saw an error regarding Cinnamon in the debug report so I removed it
  and the PPA associated with it, but I'm still having problems.

  Description:	Ubuntu 12.04.5 LTS
  Release:	12.04

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.17
  ProcVersionSignature: Ubuntu 3.5.0-54.81~precise1-generic 3.5.7.33
  Uname: Linux 3.5.0-54-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu17.7
  Architecture: amd64
  Date: Wed Sep  3 08:30:59 2014
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1389015387
   com.ubuntu.update-manager window-height 500
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2014-09-03 (0 days ago)

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