[Bug 1489156] [NEW] distribution upgrade to version 14.04 fails

[ed]

Public bug reported:

distribution upgrade failed to calculate  - an unresolvable problem
occurred while calculating the upgrade

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.19
ProcVersionSignature: Ubuntu 3.2.0-88.126-generic 3.2.69
Uname: Linux 3.2.0-88-generic i686
ApportVersion: 2.0.1-0ubuntu17.9
Architecture: i386
CheckboxSubmission: 122888be1718e78059feb52f980685fd
CheckboxSystem: 590a1439899ea06bec40afc985563271
Date: Wed Aug 26 13:01:28 2015
GsettingsChanges:
 
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2015-08-26 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug dist-upgrade i386 precise

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https://bugs.launchpad.net/bugs/1489156

Title:
  distribution upgrade to version 14.04 fails

Status in update-manager package in Ubuntu:
  New

Bug description:
  distribution upgrade failed to calculate  - an unresolvable problem
  occurred while calculating the upgrade

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.19
  ProcVersionSignature: Ubuntu 3.2.0-88.126-generic 3.2.69
  Uname: Linux 3.2.0-88-generic i686
  ApportVersion: 2.0.1-0ubuntu17.9
  Architecture: i386
  CheckboxSubmission: 122888be1718e78059feb52f980685fd
  CheckboxSystem: 590a1439899ea06bec40afc985563271
  Date: Wed Aug 26 13:01:28 2015
  GsettingsChanges:
   
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2015-08-26 (0 days ago)
  VarLogDistupgradeTermlog:

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