[Bug 1792136] Re: Upgrade from 16.04 to 18.04 fails when trying to sett new software channels

[Brian Murray]

*** This bug is a duplicate of bug 1611737 ***
    https://bugs.launchpad.net/bugs/1611737

** This bug has been marked a duplicate of bug 1611737
   Can't upgrade from a release if ros packages are  installed from ROS servers

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https://bugs.launchpad.net/bugs/1792136

Title:
  Upgrade from 16.04 to 18.04 fails when trying to sett new software
  channels

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

Bug description:
  I had closed most of the 3rd party software on my computer, and have
  removed all non-ubuntu software distributions. Yet I keep getting an
  error when I try to upgrade to 18.04 when setting new software
  channels. I'm not sure what other information would be useful besides
  the laptop. On that note, I am using a Lenovo Yoga 2 and running
  Ubuntu 16.04.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-135.161-generic 4.4.140
  Uname: Linux 4.4.0-135-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Wed Sep 12 06:31:52 2018
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-09-12 (0 days ago)
  VarLogDistupgradeTermlog:

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