Public bug reported:
did a sudo do-release-upgrade
started but ended with the message An unresolvable problem occurred while
calculating the upgrade.
1) lsb_release -rd
Description: Ubuntu 14.04.5 LTS
Release: 14.04
2) upgrade to 16.04
3) Expected the system would upgrade
4) message "An unresolvable problem occurred while calculating the
upgrade." Upgrade stopped
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.9
ProcVersionSignature: Ubuntu 3.5.0-32.53-generic 3.5.7.11
Uname: Linux 3.5.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.25
Architecture: amd64
CrashDB: ubuntu
Date: Tue Aug 1 21:28:44 2017
InstallationDate: Installed on 2013-02-16 (1626 days ago)
InstallationMedia: Ubuntu-Server 12.10 "Quantal Quetzal" - Release amd64
(20121017.2)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2017-08-01 (0 days ago)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade trusty
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https://bugs.launchpad.net/bugs/1707998
Title:
Upgrade from 14.04.5 to 16.04 failed
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