Public bug reported:
$ sudo apt do-release-upgrade
.
.
.
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating the changes
Calculating the changes
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu
If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.29
ProcVersionSignature: Ubuntu 4.13.0-22.25-generic 4.13.13
Uname: Linux 4.13.0-22-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Thu Dec 6 21:08:11 2018
InstallationDate: Installed on 2016-10-24 (773 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2018-12-07 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2018-12-06T10:28:19.136187
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic bionic2cosmic dist-upgrade third-party-packages
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https://bugs.launchpad.net/bugs/1807323
Title:
Unable to update 18.04 to 18.10
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