[Bug 1931031] Re: when i upgrade from version 18.04 to 20.04, an unsolvable problem occurred while calculating the progress, and the upgrade crashes

[Chris Guiver]

*** This bug is a duplicate of bug 1069133 ***
    https://bugs.launchpad.net/bugs/1069133

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

I see a number of 3rd party packages, esp. from
https://launchpad.net/~oibaf/+ppa-packages

For best results with a release-upgrade, you should remove all 3rd party
packages (bringing your system back to a pure Ubuntu one, ie. no 3rd
party packages) then perform the upgrade.  The tool ppa-purge can assist
with this.

Likely related to https://bugs.launchpad.net/ubuntu/+source/ubuntu-
release-upgrader/+bug/1069133

(following from https://bugs.launchpad.net/ubuntu/+source/ubuntu-
release-upgrader/+bug/1922546/comments/2)

[The use of oibaf ppa]  will prevent the upgrade as that PPA contains
package version numbers greater than the release to which you are
upgrading. You can revert the PPA by installing the ppa-purge package
from the official Ubuntu archive and then running 'sudo ppa-purge
ppa:oibaf/graphics-drivers'. After that you can try upgrading again and
if it still fails open a new bug report. Thanks and good luck!


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

** Tags added: ppa xorg-oibaf-ppa

** This bug has been marked a duplicate of bug 1069133
   Get upgrade error 12.04 - 12.10 "Could not determine upgrade" - xorg from ppa

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https://bugs.launchpad.net/bugs/1931031

Title:
  when i upgrade from version 18.04 to 20.04, an unsolvable problem
  occurred while calculating the progress, and the upgrade crashes

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

Bug description:
  when i upgrade from version 18.04 to 20.04, an unsolvable problem
  occurred while calculating the progress, and the upgrade crashes

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.44
  ProcVersionSignature: Ubuntu 4.15.0-144.148-generic 4.15.18
  Uname: Linux 4.15.0-144-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.24
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Jun  6 18:57:22 2021
  InstallationDate: Installed on 2018-01-29 (1223 days ago)
  InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-06-06 (0 days ago)
  VarLogDistupgradeTermlog:

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