[Bug 1516998] [NEW] Cannot upgrade Ubuntu to latest version

[Klod]

Public bug reported:

Trying to upgrade to 14.04.3 LTD. Update Manager shows error "Could not
determine the upgrade".

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.19
ProcVersionSignature: Ubuntu 3.2.0-94.134-generic 3.2.72
Uname: Linux 3.2.0-94-generic i686
ApportVersion: 2.0.1-0ubuntu17.13
Architecture: i386
Date: Tue Nov 17 11:47:38 2015
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1447760694
 com.ubuntu.update-manager window-height 518
 com.ubuntu.update-manager window-width 600
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 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 2015-11-17 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug dist-upgrade i386 precise third-party-packages

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https://bugs.launchpad.net/bugs/1516998

Title:
  Cannot upgrade Ubuntu to latest version

Status in update-manager package in Ubuntu:
  New

Bug description:
  Trying to upgrade to 14.04.3 LTD. Update Manager shows error "Could
  not determine the upgrade".

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.19
  ProcVersionSignature: Ubuntu 3.2.0-94.134-generic 3.2.72
  Uname: Linux 3.2.0-94-generic i686
  ApportVersion: 2.0.1-0ubuntu17.13
  Architecture: i386
  Date: Tue Nov 17 11:47:38 2015
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1447760694
   com.ubuntu.update-manager window-height 518
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   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 2015-11-17 (0 days ago)
  VarLogDistupgradeTermlog:

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