[Bug 1776202] Re: can't upgrade to new version

[Brian Murray]

Your sources.list file contains entries for Ubuntu 14.04 however you
have the lsb-release package from Ubuntu 16.04. This has confused the
release-upgrader and caused it to be unable to calculate the upgrade.
While there may be other packages from Ubuntu 16.04 also installed on
your system at a minimum please reinstall the version of lsb-release
from 14.04 and try the upgrade again.  Thanks and good luck!

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1776202

Title:
  can't upgrade to new version

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

Bug description:
  I cannot upgrade to the 16.04 or 18.04

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 3.13.0-124.173-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-124-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon Jun 11 06:36:44 2018
  InstallationDate: Installed on 2017-02-27 (469 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-06-11 (0 days ago)
  VarLogDistupgradeTermlog:

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