Public bug reported:
I just thought it would upgrade from 18.04.5 LTS to 20 automatically but
I get an error message and don't know what to do . What is PPA, PPA-
Purge package and launchpad PPA? How do I know what is official and what
is unoffical Ubuntu software?
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.42
ProcVersionSignature: Ubuntu 4.15.0-139.143-generic 4.15.18
Uname: Linux 4.15.0-139-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 29 15:13:23 2021
InstallationDate: Installed on 2017-04-11 (1447 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64
(20170215.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-03-29 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages
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https://bugs.launchpad.net/bugs/1921673
Title:
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. If
none of this applies, then please report this bug using the command
'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If you want
to investigate this yourself the log files in '/var/log/dist-upgrade'
will contain details about the upgrade. Specifically, look at
'main.log' and 'apt.log'. Comment: I don't know what this means.
To manage notifications about this bug go to:
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