[Bug 1397401] Re: Ubuntu upgrade fails

[Yo]

hi,

you want install Ubuntu 14.04 LTS ?
Upgrading from Ubuntu 12.04 LTS or Ubuntu 13.10 on a desktop system:
    Press Alt+F2 and type in "update-manager" (without the quotes) into the command box.
    Update Manager should open up and tell you: New distribution release '14.04 LTS' is available.
    Click Upgrade and follow the on-screen instructions. 

Offline upgrade options via alternate CDs are no longer offered for
Ubuntu Desktop and Ubuntu Server. Please ensure you have network
connectivity to one of the official mirrors or to a locally accessible
mirror and follow the instructions above.


If you want retry : in terminal
 
sudo dpkg-reconfigure -phigh -a

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https://bugs.launchpad.net/bugs/1397401

Title:
  Ubuntu upgrade fails

Status in update-manager package in Ubuntu:
  New

Bug description:
  Message says:

  Could not determine 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.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.17
  ProcVersionSignature: Ubuntu 3.2.0-70.105-generic-pae 3.2.63
  Uname: Linux 3.2.0-70-generic-pae i686
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu17.8
  Architecture: i386
  Date: Fri Nov 28 18:08:53 2014
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1415463944
   com.ubuntu.update-manager window-height 518
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm-color
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2014-11-28 (0 days ago)
  VarLogDistupgradeTermlog:

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