Public bug reported:
It was accompanied by an error saying a list of packages could not be
authenticated.
In the bug report description, it stated part of a file had been modified, and
then displayed the release upgrade options from the Software Updater.
It was accompanied by an error stating that some third party services (or
something) had to be disabled.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.16.0-57.77~14.04.1-generic 3.16.7-ckt20
Uname: Linux 3.16.0-57-generic i686
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: i386
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Tue Jan 5 17:55:05 2016
InstallationDate: Installed on 2015-07-23 (166 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release i386 (20150218.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-01-05 (0 days ago)
VarLogDistupgradeTermlog:
mtime.conffile..etc.update.manager.release.upgrades: 2016-01-01T07:42:42.451084
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug dist-upgrade i386 third-party-packages trusty
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https://bugs.launchpad.net/bugs/1531333
Title:
error installing Unity desktop when upgrading 14.04 to 15.05
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