[Bug 1553476] [NEW] cannot upgrade ubuntu 14.04 to later version

[Hans Heider]

Public bug reported:

When I try to upgrade 14.04 to a later version via the update-manager
this fails.

It tells me that 15.10 would be available, but then claims to try to
upgrade to 15.04. This fails with the default error message window (=
this can happen when using a pre-release version etc.). I never used a
pre-release version.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-79.123-generic 3.13.11-ckt33
Uname: Linux 3.13.0-79-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: GNOME
Date: Sat Mar  5 11:35:22 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2010-11-22 (1930 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-03-05 (0 days ago)
VarLogDistupgradeTermlog:
 
mtime.conffile..etc.update.manager.release.upgrades: 2016-01-30T13:12:39.448637

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade trusty

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https://bugs.launchpad.net/bugs/1553476

Title:
  cannot upgrade ubuntu 14.04 to later version

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

Bug description:
  When I try to upgrade 14.04 to a later version via the update-manager
  this fails.

  It tells me that 15.10 would be available, but then claims to try to
  upgrade to 15.04. This fails with the default error message window (=
  this can happen when using a pre-release version etc.). I never used a
  pre-release version.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-79.123-generic 3.13.11-ckt33
  Uname: Linux 3.13.0-79-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: GNOME
  Date: Sat Mar  5 11:35:22 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2010-11-22 (1930 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-03-05 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update.manager.release.upgrades: 2016-01-30T13:12:39.448637

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