[Bug 1405830] [NEW] Cannot upgrade distro

[Orlando]

Public bug reported:

while trying to upgrade to 14.04.1 from 12.04, i have found this error.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.17
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
Date: Fri Dec 26 16:37:25 2014
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1419618091
 com.ubuntu.update-manager show-details true
 com.ubuntu.update-manager window-height 942
 com.ubuntu.update-manager window-width 1227
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2014-12-26 (0 days ago)

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


** Tags: amd64 apport-bug dist-upgrade precise third-party-packages

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https://bugs.launchpad.net/bugs/1405830

Title:
  Cannot upgrade distro

Status in update-manager package in Ubuntu:
  New

Bug description:
  while trying to upgrade to 14.04.1 from 12.04, i have found this
  error.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.17
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu17.8
  Architecture: amd64
  Date: Fri Dec 26 16:37:25 2014
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1419618091
   com.ubuntu.update-manager show-details true
   com.ubuntu.update-manager window-height 942
   com.ubuntu.update-manager window-width 1227
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2014-12-26 (0 days ago)

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