[Bug 1888535] Re: upgrade to 20.04 fails with can't install ubuntu-mate-core message

[Brian Murray]

Ah, you also have the universe repository of the Ubuntu archive disabled
and that is where ubuntu-mate-desktop comes from. You'll need to enable
universe and install ubuntu-mate-desktop and try the upgrade again.

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https://bugs.launchpad.net/bugs/1888535

Title:
  upgrade to 20.04 fails with can't install ubuntu-mate-core message

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

Bug description:
  I have been trying to update for 3 or 4 days, have removed all the
  launchpad repositories, purged everything I can think of anb the
  upgrade just fails...

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.37
  ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.15
  Architecture: amd64
  CrashDB: ubuntu
  Date: Wed Jul 22 17:09:16 2020
  InstallationDate: Installed on 2019-07-17 (370 days ago)
  InstallationMedia: Ubuntu-MATE 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-07-22 (0 days ago)
  VarLogDistupgradeTermlog:

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