[Bug 1385281] Re: Cannot upgrade ubuntu 12.04 precise to 14.04

[Mehdi Fattahi]

Problem fixed.

I ran the foolowing command to determine obsolete packages. After
removing them, the upgrade succeeded.


$ cat /var/log/dist-upgrade/main.log | grep Obsolete

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https://bugs.launchpad.net/bugs/1385281

Title:
  Cannot upgrade ubuntu 12.04 precise to 14.04

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  Trying to upgrade ubuntu 12.04 to the next LTS release I got the
  following error:

  An unresolvable problem occurred while calculating the upgrade.

  This can be caused by: 
  * Upgrading to a pre-release version of Ubuntu 
  * Running the current pre-release version of Ubuntu 
  * Unofficial software packages not provided by Ubuntu

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.12
  ProcVersionSignature: Ubuntu 3.2.0-60.91-generic-pae 3.2.55
  Uname: Linux 3.2.0-60-generic-pae i686
  ApportVersion: 2.0.1-0ubuntu17.7
  Architecture: i386
  Date: Fri Oct 24 17:00:58 2014
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1414157159
   com.ubuntu.update-manager window-height 500
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2014-10-24 (0 days ago)
  VarLogDistupgradeAptclonesystemstate.tar.gz: Error: [Errno 13] Permission denied: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'

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