[Bug 1721486] Re: lunubu can't upgrade from 16.04 to 17.04. sudo do-release-upgrade encountered weird error

[Ubuntu Foundations Team Bug Bot]

*** This bug is a duplicate of bug 1069133 ***
    https://bugs.launchpad.net/bugs/1069133

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1069133, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug.  Additionally, any further discussion regarding the bug should occur in the other report.  Please continue to report any other bugs you may find.
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** This bug has been marked a duplicate of bug 1069133
   Get upgrade error 12.04 - 12.10 "Could not determine upgrade" - xorg from ppa

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https://bugs.launchpad.net/bugs/1721486

Title:
  lunubu can't upgrade from 16.04 to 17.04.  sudo do-release-upgrade
  encountered weird error

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

Bug description:
  trying to upgrade from do-release-upgrade, and encountered error.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.22
  ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
  Uname: Linux 4.4.0-97-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: LXDE
  Date: Thu Oct  5 16:53:41 2017
  InstallationDate: Installed on 2016-09-12 (387 days ago)
  InstallationMedia: Lubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2017-10-05 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2017-10-05T16:42:18.535388

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