Public bug reported: It seems like a conflicting package, haven't installed anything out of the ordinary.
ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: update-manager 1:0.156.14.15 ProcVersionSignature: Ubuntu 3.5.0-52.79~precise1-generic 3.5.7.33 Uname: Linux 3.5.0-52-generic i686 ApportVersion: 2.0.1-0ubuntu17.6 Architecture: i386 Date: Mon Jul 14 21:09:15 2014 GsettingsChanges: com.ubuntu.update-manager first-run false com.ubuntu.update-manager launch-time 1405335651 com.ubuntu.update-manager window-height 500 com.ubuntu.update-manager window-width 600 InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213) MarkForUpload: True PackageArchitecture: all ProcEnviron: LANGUAGE=en_AU:en TERM=xterm PATH=(custom, no user) LANG=en_AU.UTF-8 SHELL=/bin/bash SourcePackage: update-manager Symptom: ubuntu-release-upgrader-core UpgradeStatus: Upgraded to precise on 2014-07-14 (0 days ago) VarLogDistupgradeTermlog: ** Affects: update-manager (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug dist-upgrade i386 precise running-unity -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1341536 Title: I am unable to upgrade from 12.04 to 14.04 using the GUI update manager To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1341536/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs