[Bug 1897870] Re: Cannot upgrade to 20.04

[Brian Murray]

This is due in part to the package gcc-10-base which you have installed
from a third party repository. Please remove that package and any others
from that third party repository using the tool 'ppa-purge' from the
package 'ppa-purge' and try the upgrade again.

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

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https://bugs.launchpad.net/bugs/1897870

Title:
  Cannot upgrade to 20.04

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

Bug description:
  Upgrade cannot be calculated. I've removed all sources besides the top
  two Canonical ones and it still doesn't work.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 5.4.0-48.52~18.04.1-generic 5.4.60
  Uname: Linux 5.4.0-48-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  Date: Wed Sep 30 18:42:23 2020
  InstallationDate: Installed on 2019-03-22 (557 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-30 (0 days ago)

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