[Bug 1541790] Re: failed to upgrade to 16.04

[Brian Murray]

** Summary changed:

- failed to upgrade to 14.10
+ failed to upgrade to 16.04

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https://bugs.launchpad.net/bugs/1541790

Title:
  failed to upgrade to 16.04

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

Bug description:
  I tried to upgrade 14.04 LTS to 14.10 and it failed with

  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

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-generic 3.19.8-ckt12
  Uname: Linux 3.19.0-49-generic x86_64
  NonfreeKernelModules: prl_fs_freeze prl_fs prl_eth prl_tg
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Thu Feb  4 11:18:04 2016
  InstallationDate: Installed on 2016-01-28 (6 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-02-04 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2016-02-04T11:15:00.391736

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