[Bug 1900210] Re: I try to upgrade 18.04 to 20.04, and "remove ppa's" from software list, as I believe is expected, but subsequent attempts at upgrade failed at the same point (after apparently loading all required new software)

[Brian Murray]

*** This bug is a duplicate of bug 1898152 ***
    https://bugs.launchpad.net/bugs/1898152

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 1898152, 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.

** This bug has been marked a duplicate of bug 1898152
   upgrade fails to calculate if gnuradio-dev is installed

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https://bugs.launchpad.net/bugs/1900210

Title:
  I try to upgrade 18.04 to 20.04, and "remove ppa's" from software
  list, as I believe is expected, but subsequent attempts at upgrade
  failed at the same point (after apparently loading all required new
  software)

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

Bug description:
  Release 18.04.5 LTS
  After command <apt-cache policy pkgname> the response was -
  N: Unable to locate package pkgname

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-121.123-generic 4.15.18
  Uname: Linux 4.15.0-121-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Oct 17 10:56:28 2020
  InstallationDate: Installed on 2013-11-26 (2516 days ago)
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-10-16 (0 days ago)
  VarLogDistupgradeTermlog:

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