[Bug 1100863] Re: Cannot upgrade Kubuntu 11.10 to 12.04

[Brian Murray]

*** This bug is a duplicate of bug 1310891 ***
    https://bugs.launchpad.net/bugs/1310891

** This bug is no longer a duplicate of bug 911082
   meta-release can be corrupted on network error
** This bug has been marked a duplicate of bug 1310891
   cached meta-release file should not be saved if it is html

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https://bugs.launchpad.net/bugs/1100863

Title:
  Cannot upgrade Kubuntu 11.10 to 12.04

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  I don't want to upgrade to proposed or devel releases. I want the
  stable 12.04 LTS, but "do-release-upgrade -c" shows no releases.
  Concerning the files collected by ubuntu-bug, I think most of them are
  not relevant, as they are related to an upgrade done in 2011.

  $ do-release-upgrade -c
  Checking for a new Ubuntu release
  No new release found

  $ do-release-upgrade -c -p
  Checking for a new Ubuntu release
  New release '12.04 LTS' available.
  Run 'do-release-upgrade' to upgrade to it.

  $ do-release-upgrade -c -d
  Checking for a new Ubuntu release
  New release  '12.04.1 LTS' available.
  Run 'do-release-upgrade' to upgrade to it.

  $ lsb_release -rd
  Description:    Ubuntu 11.10
  Release:        11.10

  $ do-release-upgrade -V
  do-release-upgrade: version 0.152.25.4

  $ apt-cache policy update-manager-core
  update-manager-core:
    Installed: 1:0.152.25.13
    Candidate: 1:0.152.25.13
    Version table:
   *** 1:0.152.25.13 0
          500 http://archive.ubuntu.com/ubuntu/ oneiric-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1:0.152.25.12 0
          500 http://security.ubuntu.com/ubuntu/ oneiric-security/main amd64 Packages
       1:0.152.25 0
          500 http://archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages

  P.s.: The original outputs were in Portuguese, so I translated them to
  English.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: update-manager-core 1:0.152.25.13
  ProcVersionSignature: Ubuntu 3.0.0-30.47-generic 3.0.57
  Uname: Linux 3.0.0-30-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu4.1
  Architecture: amd64
  Date: Thu Jan 17 17:30:38 2013
  InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008)
  ProcEnviron:
   LANGUAGE=pt_BR:pt:en
   PATH=(custom, no user)
   LANG=pt_BR.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to oneiric on 2011-12-29 (384 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2013-01-17T16:58:10.506821

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