[Bug 1475121] Re: trying to up-grade from Ubuntu-12.04-LTS to 14.04-LTS

[Eps]

I used the following command to start the update:  sudo do-release-
upgrade

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https://bugs.launchpad.net/bugs/1475121

Title:
  trying to up-grade from Ubuntu-12.04-LTS to 14.04-LTS

Status in update-manager package in Ubuntu:
  New

Bug description:
  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 
  === Command detached from window (Wed Jul 15 20:52:08 2015) ===

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.19
  ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27
  Uname: Linux 3.2.0-30-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.0.1-0ubuntu17.9
  Architecture: amd64
  Date: Wed Jul 15 20:52:51 2015
  GsettingsChanges:
   com.ubuntu.update-manager check-new-release-ignore 'trusty'
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1437016317
   com.ubuntu.update-manager window-height 856
   com.ubuntu.update-manager window-width 822
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   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 2015-07-16 (0 days ago)

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