[Bug 1527838] Re: Upgrade from 12.04 LTS to 14.04 LTS failed due to apparent lack of ubuntu-minimal in /etc/apt/sources.list

[Launchpad Bug Tracker]

[Expired for update-manager (Ubuntu) because there has been no activity
for 60 days.]

** Changed in: update-manager (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1527838

Title:
  Upgrade from 12.04 LTS to 14.04 LTS failed due to apparent lack of
  ubuntu-minimal in /etc/apt/sources.list

Status in update-manager package in Ubuntu:
  Expired

Bug description:
  update=manager after 5 min. reports:

  ...  After updating your package information, the essential package 'ubuntu-minimal' could not be located. This may be because you have no official mirrors listed in your software sources, or because of excessive load on the mirror you are using. See /etc/apt/sources.list for the current list of configured software sources. In the case of an overloaded mirror, you may want to try the upgrade again later.
  ...

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.17
  ProcVersionSignature: Ubuntu 3.2.0-76.111-generic 3.2.66
  Uname: Linux 3.2.0-76-generic i686
  ApportVersion: 2.0.1-0ubuntu17.8
  Architecture: i386
  Date: Sat Dec 19 02:12:01 2015
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1450507753
   com.ubuntu.update-manager show-details true
   com.ubuntu.update-manager window-height 613
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=dumb
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2015-12-19 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2015-12-19 01:59:26.795464
   Log time: 2015-12-19 02:00:00.971510
   Log time: 2015-12-19 02:02:36.247183
   Log time: 2015-12-19 02:12:06.705257
  VarLogDistupgradeTermlog:

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