Public bug reported:
I tried to upgrade ubuntu from 18 to 20.04. First it crashed complaining
that I should purge 3rd party ppa's. After I disabled them in the
software & update under the other software section it still crashes at
the same point with an reduced error message as follows:
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
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'.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.44
ProcVersionSignature: Ubuntu 5.4.0-72.80~18.04.1-generic 5.4.101
Uname: Linux 5.4.0-72-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed May 5 11:57:29 2021
InstallationDate: Installed on 2019-06-19 (685 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-05-05 (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/1927204
Title:
Upgrade to 20.04 crashes even after disabling all 3rd party software
sources
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