[Bug 1621908] Re: Unable to upgrade from 14.04 to 16.04

[Dimitri Papadopoulos]

This was probably the most recent VarLogDistupgradeMainlog.txt, in any
case it was sent automatically. As I said 'ubuntu-desktop' was already
installed. Unfortunately the workstation has been reinstalled - a clean
install - so I will not be able to send more details.

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https://bugs.launchpad.net/bugs/1621908

Title:
  Unable to upgrade from 14.04 to 16.04

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

Bug description:
  This command ends up with errors:
  sudo do-release-upgrade

  Error messages are not helpful.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-95.142-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-95-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Sep  9 17:36:51 2016
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-09-09 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2016-09-09T17:15:39.718221

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