[Bug 1786640] Re: Update manager can't calculate solution

[Brian Murray]

You appear to have packages installed from the -updates pocket of the
Ubuntu archive, but you don't have it enabled in your
/etc/apt/sources.list file. Please add it to your sources.list file and
then run 'apt-get update' and then try the upgrade again. Thanks and
good luck.

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

** Summary changed:

- Update manager can't calculate solution
+ Update manager can't calculate solution due to no candidate for ubuntu-minimal

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https://bugs.launchpad.net/bugs/1786640

Title:
  Update manager can't calculate solution due to no candidate for
  ubuntu-minimal

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

Bug description:
  Upgrade from 16.04 to 18.04.
  Tried to apply fix for unescaped & 
  Dist-upgrade log shows long list of 'broken' packages when attempting to do-dist-upgrade
  apt update and apt upgrade work seemingly perfectly.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
  Uname: Linux 4.4.0-131-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sat Aug 11 18:33:46 2018
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-08-11 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2018-08-11T17:00:09.348260

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