Public bug reported:
ubuntu release:
Description: Ubuntu 18.04.5 LTS
Release: 18.04
Error output:
Could not calculate the upgrade
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'.
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
main.log :
2020-08-10 11:44:24,081 ERROR Dist-upgrade failed: 'E:Error,
pkgProblemResolversolver::Resolve generated breaks, this may be caused
by held packages.'
2020-08-10 11:44:24,082 DEBUG abort called
purged all rc status files but still unresolved
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.16
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 10 11:49:54 2020
InstallationDate: Installed on 2020-01-04 (219 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-08-10 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2020-08-10T11:20:53.956256
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic dist-upgrade
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https://bugs.launchpad.net/bugs/1890989
Title:
can't upgrade to ubuntu 20.04.1 LTS , says caused by unofficial
software packages not provided by ubuntu
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