[Bug 1922232] Re: Unable to upgrade from Ubuntu 18.04 to 20.04.2

[Diksha]

Thanks for your prompt response! 
Following is the output for the command : do-release-upgrade -p on Ubuntu 20.04

Checking for a new Ubuntu release
There is no development version of an LTS available.
To upgrade to the latest non-LTS development release 
set Prompt=normal in /etc/update-manager/release-upgrades.

\n\n
Note: 
After, Reporting the mentioned problem,I uninstalled 3rd party software and again tried. It prompted me to continue with partial upgrade. 
After partial upgration the system wasn't functioning well. So i ran the following command: 
sudo apt-get dist-upgrade

But it ran into new problem - https://bugs.launchpad.net/bugs/1922351 (still facing)
The system is working well but slow.

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https://bugs.launchpad.net/bugs/1922232

Title:
  Unable to upgrade from Ubuntu 18.04 to 20.04.2

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

Bug description:
  An unresolvable problem occurred while calculating the upgrade.

   This was likely caused by:
   * Unofficial software packages not provided by Ubuntu
  Please use the tool 'ppa-purge' from the ppa-purge 
  package to remove software from a Launchpad PPA and 
  try the upgrade again.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.42
  ProcVersionSignature: Ubuntu 5.4.0-70.78~18.04.1-generic 5.4.94
  Uname: Linux 5.4.0-70-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Apr  1 17:27:42 2021
  InstallationDate: Installed on 2021-02-25 (34 days ago)
  InstallationMedia: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64 (20200806.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-04-01 (0 days ago)
  VarLogDistupgradeTermlog:

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