Failed upgrade from 16.04 to 18.04: could not calculate upgrade
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
ubuntu-release-upgrader (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
-Source package: ubuntu-
1) lsb_release -rd:
Description: Ubuntu 16.04.5 LTS
Release: 16.04
2) apt-cache policy ubuntu-
ubuntu-
Installato: 1:16.04.25
Candidato: 1:16.04.25
Tabella versione:
*** 1:16.04.25 500
500 http://
500 http://
500 http://
500 http://
100 /var/lib/
1:16.04.12 500
500 http://
500 http://
3) I expected to upgrade smoothly from Ubuntu 16.04 LTS to 18.04 LTS.
4) Instead, when using 'sudo do-release-upgrade' the process stops, throwing the error message 'could not calculate upgrade' and suggesting different causes. Unfortunately, all of them are beyond my understanding and therefore I don't know which package could cause this problem.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-
ProcVersionSign
Uname: Linux 4.4.0-133-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Mon Aug 20 18:15:32 2018
InstallationDate: Installed on 2014-06-21 (1520 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
PackageArchitec
SourcePackage: ubuntu-
UpgradeStatus: Upgraded to xenial on 2018-08-20 (0 days ago)
description: | updated |
tags: | added: xenial2bionic |