[Bug 1897943] Re: Initally upgrade stopped for extra PPAs which I removed and tried upgrade again without rebooting. It generated this error as unresolvable error.

[Brian Murray]

Removing from software manager is not the same things as removing the
packages from the PPA. You still have packages installed from the oibaf-
ubuntu-graphics-drivers-bionic PPA. Those packages are preventing the
upgrade from being calculated. You need to reenable the PPAs and then
use the tool ppa-purge from the ppa-purge package to remove those PPAs.

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

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https://bugs.launchpad.net/bugs/1897943

Title:
  Initally upgrade stopped for extra PPAs which I removed and tried
  upgrade again without rebooting. It generated this error as
  unresolvable error.

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

Bug description:
  I tried to upgrade from 18.04 to 20.04 which stopped for the first
  time with advice to remove extra PPAs. I remove from software manager
  and tried upgrade which generated this error.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.39
  Uname: Linux 5.6.4-050604-generic x86_64
  NonfreeKernelModules: vtsspp sep5 socperf3 pax
  ApportVersion: 2.20.9-0ubuntu7.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Sep 30 22:22:17 2020
  InstallationDate: Installed on 2019-11-29 (306 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-30 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2020-05-26T21:50:04.292544

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