[Bug 1450900] [NEW] I just can't do a release upgrade. No matter what I try.

[Guilherme Schvarcz Franco]

Public bug reported:

I'm using ubuntu 12.04 LTS and trying to upgrade to Ubuntu 14.04 LTS.

I have all upgrades for my current version, but when I try to upgrade it
returns:

    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. 


So, here I am. I already try to remove all ppa's that I added. And a few other things.


Any advice or response for this bug?

Thanks in advance

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.18
ProcVersionSignature: Ubuntu 3.13.0-51.84~precise1-generic 3.13.11-ckt18
Uname: Linux 3.13.0-51-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
Date: Fri May  1 16:54:00 2015
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1430509684
 com.ubuntu.update-manager show-details true
 com.ubuntu.update-manager window-height 658
 com.ubuntu.update-manager window-width 617
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
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 2015-05-01 (0 days ago)

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade precise running-unity

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https://bugs.launchpad.net/bugs/1450900

Title:
  I just can't do a release upgrade. No matter what I try.

Status in update-manager package in Ubuntu:
  New

Bug description:
  I'm using ubuntu 12.04 LTS and trying to upgrade to Ubuntu 14.04 LTS.

  I have all upgrades for my current version, but when I try to upgrade
  it returns:

      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. 

  
  So, here I am. I already try to remove all ppa's that I added. And a few other things.

  
  Any advice or response for this bug?

  Thanks in advance

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.18
  ProcVersionSignature: Ubuntu 3.13.0-51.84~precise1-generic 3.13.11-ckt18
  Uname: Linux 3.13.0-51-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.8
  Architecture: amd64
  Date: Fri May  1 16:54:00 2015
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1430509684
   com.ubuntu.update-manager show-details true
   com.ubuntu.update-manager window-height 658
   com.ubuntu.update-manager window-width 617
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
  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 2015-05-01 (0 days ago)

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