[Bug 1494853] Re: Crash on Ubuntu upgrade attempt from 14.04.3 LTS to newer version

[Brian Murray]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. The release upgrade process will now try to upgrade from
14.04 (Trusty) to 15.04 (Vivid) as 14.10 (Utopic) is End of Life. Could
you please try the upgrade process again and if it fails open a new bug
report following the same process you used to open this one? Thanks in
advance!

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

** Tags added: lp-1497024

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https://bugs.launchpad.net/bugs/1494853

Title:
  Crash on Ubuntu upgrade attempt from 14.04.3 LTS to newer version

Status in ubuntu-release-upgrader package in Ubuntu:
  Incomplete

Bug description:
  After running sudo "do-release-upgrade -d" in the Terminal in an
  attempt to upgrade from Trusty to Vivid, the process was cut short by
  the following messages:

  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done
  Building data structures... Done 

  Calculating the changes

  Calculating the changes

  Could not calculate the upgrade

  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 

  ubuntu-release-upgrader-core:
    Installed: 1:0.220.7

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.7
  ProcVersionSignature: Ubuntu 3.19.0-28.30~14.04.1-generic 3.19.8-ckt5
  Uname: Linux 3.19.0-28-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.13
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Sep 11 12:58:19 2015
  InstallationDate: Installed on 2015-08-25 (16 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2015-09-11 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2015-09-11T12:27:52.718891

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