[Bug 1534571] [NEW] 14.04->14.10 Upgrade didn't go through due to three reasons that seem shouldn't apply

[Bijan Vakili]

Public bug reported:


Tried to upgrade from 14.04 to 14.10
Changed /etc/update-manager/release-upgrades to have:
Prompt=normal
And then ran upgrade
sudo do-release-upgrade

Source: http://askubuntu.com/questions/614075/update-lubuntu-14-04-to-14-10
Got error:
"
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 
=== Command terminated with exit status 1 (Fri Jan 15 06:55:49 2016) ===

"

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-74.118-generic 3.13.11-ckt30
Uname: Linux 3.13.0-74-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Fri Jan 15 06:53:51 2016
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-01-15 (0 days ago)
modified.conffile..etc.update.manager.release.upgrades: [modified]
mtime.conffile..etc.update.manager.release.upgrades: 2016-01-15T06:51:49.046263

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade trusty

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https://bugs.launchpad.net/bugs/1534571

Title:
  14.04->14.10 Upgrade didn't go through due to three reasons that seem
  shouldn't apply

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  
  Tried to upgrade from 14.04 to 14.10
  Changed /etc/update-manager/release-upgrades to have:
  Prompt=normal
  And then ran upgrade
  sudo do-release-upgrade

  Source: http://askubuntu.com/questions/614075/update-lubuntu-14-04-to-14-10
  Got error:
  "
  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 
  === Command terminated with exit status 1 (Fri Jan 15 06:55:49 2016) ===

  "

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-74.118-generic 3.13.11-ckt30
  Uname: Linux 3.13.0-74-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Jan 15 06:53:51 2016
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-01-15 (0 days ago)
  modified.conffile..etc.update.manager.release.upgrades: [modified]
  mtime.conffile..etc.update.manager.release.upgrades: 2016-01-15T06:51:49.046263

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