[Bug 1829767] Re: LTS Upgrade from Ubuntu 14.04 to 16.04 failed

[Tom Reynolds]

Please note that Kubuntu 14.04 LTS is no longer supported: 
https://wiki.ubuntu.com/Releases 

The Ubuntu community documentation describes a means of upgrading from an EOL release:
https://help.ubuntu.com/community/EOLUpgrades

The technical reason your upgrade attempt failed is that due to a
combination of unsupported third party packages, some of which have no
upgrade path, no upgrade appears possible. Removing third party APT
repositories and downgrading to Ubuntu 14.04 versions / removing
packages not available in 14.04 may put this system into a situation
where an upgrade can succeed. A better recommendation is a fresh
installation.

Summing up, this is not a bug, but a support issue.

Extended support for Ubuntu 14.04 LTS is available from Canonical: https://www.ubuntu.com/esm 
Community support for EOL upgrades may be available from volunteers: https://www.ubuntu.com/support/community-support

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1829767

Title:
  LTS Upgrade from Ubuntu 14.04 to 16.04 failed

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

Bug description:
  Upgrade from ubuntu 14 using update-manager failed. Console log
  follows :

  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 
  gerard at ASUS-HP-UB:~$ sudo ubuntu-bug ubuntu-release-upgrader-core

  (apport-gtk:15348): Gtk-WARNING **: Locale not supported by C library.
          Using the fallback 'C' locale.

  (firefox:15645): Gtk-WARNING **: Locale not supported by C library.
          Using the fallback 'C' locale.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.11
  ProcVersionSignature: Ubuntu 3.19.0-80.88~14.04.1-generic 3.19.8-ckt22
  Uname: Linux 3.19.0-80-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.29
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon May 20 16:39:21 2019
  InstallationDate: Installed on 2015-09-25 (1332 days ago)
  InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2019-05-20 (0 days ago)

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