[Bug 1749206] Re: Can't upgrade from 14.04 LTS t o 16.04 LTS

[Maria Vila Casadesus]

Solved removing all PPA packages with:

 sudo ppa-purge xorg-edgers

and other conflictive packages.

** Changed in: ubuntu-release-upgrader (Ubuntu)
     Assignee: (unassigned) => Maria Vila Casadesus (mariavica)

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https://bugs.launchpad.net/bugs/1749206

Title:
  Can't upgrade from 14.04 LTS t o 16.04 LTS

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

Bug description:
  Description:	Ubuntu 14.04.5 LTS
  Release:	14.04

  
  > sudo do-release-upgrade

  
  ......

  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 1:0.220.9
  ProcVersionSignature: Ubuntu 3.13.0-79.123-generic 3.13.11-ckt33
  Uname: Linux 3.13.0-79-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.27
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Feb 13 15:42:54 2018
  InstallationDate: Installed on 2014-10-11 (1221 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2018-02-13 (0 days ago)

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