Public bug reported:
The error message received when trying to upgrade goes as follows:
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'.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.36
ProcVersionSignature: Ubuntu 4.15.0-74.84-generic 4.15.18
Uname: Linux 4.15.0-74-generic x86_64
NonfreeKernelModules: talpa_vfshook talpa_pedconnector talpa_pedevice
talpa_vcdevice talpa_core talpa_linux talpa_syscallhook
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CrashDB: ubuntu
Date: Wed Jan 22 21:59:00 2020
InstallationDate: Installed on 2019-07-24 (182 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-01-22 (0 days ago)
VarLogDistupgradeTermlog:
mtime.conffile..etc.update-manager.release-upgrades: 2020-01-11T15:14:53.647131
** 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/1860611
Title:
xubuntu - cannot upgrade from 18.04 to 19.04
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