Public bug reported:
I used the default GUI software updater which suggested me to update to
Ubuntu 20. Then the following error was shown:
---
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'.
---
The following command did not produce any output:
sudo grep -i ppa.launchpad.net /etc/apt/sources.list.d/*.list
I read the logs in '/var/log/dist-upgrade' but couldn't find anything
useful.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 5.4.0-48.52~18.04.1-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 9 22:26:24 2020
InstallationDate: Installed on 2020-02-23 (229 days ago)
InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64
(20200203.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-10-09 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic dist-upgrade
** Summary changed:
- Upgrade from Ubuntu 18.04.5 LTS to Ubuntu 20.04.1 LTS
+ Upgrade from Ubuntu 18.04.5 LTS to Ubuntu 20.04.1 LTS failed - unresolvable
problem
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https://bugs.launchpad.net/bugs/1899212
Title:
Upgrade from Ubuntu 18.04.5 LTS to Ubuntu 20.04.1 LTS failed -
unresolvable problem
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