not upgrading from 14.04 to 15.04

[Ronald B. Bellimer, Sr.]

[6767:6767:0123/042655:ERROR:background_mode_manager_aura.cc(13)] Not implemented reached in virtual void BackgroundModeManager::EnableLaunchOnStartup(bool)
[6767:6767:0123/042656:ERROR:logging.h(808)] Failed to call method: org.freedesktop.DBus.ObjectManager.GetManagedObjects: object_path= /: org.freedesktop.DBus.Error.ServiceUnknown: The name org.bluez was not provided by any .service files
[6767:6767:0123/042656:ERROR:logging.h(808)] Failed to call method: org.freedesktop.DBus.ObjectManager.GetManagedObjects: object_path= /: org.freedesktop.DBus.Error.ServiceUnknown: The name org.bluez was not provided by any .service files
[6918:6918:0123/042657:ERROR:sandbox_linux.cc(338)] InitializeSandbox() called with multiple threads in process gpu-process

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-76.120-generic 3.13.11-ckt30
Uname: Linux 3.13.0-76-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sat Jan 23 04:23:50 2016
InstallationDate: Installed on 2014-12-06 (412 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-01-23 (0 days ago)
VarLogDistupgradeTermlog:

mtime.conffile..etc.update.manager.release.upgrades: 2014-12-06T18:21:54.379389

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1534374, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.