[Bug 1487232] [NEW] trying to upgrade lts 12.04 to 14.04

[auxbuss]

Public bug reported:

I run: sudo update-manager -d
Update manager says: You must check for updates manually. Options: Check and Close.
I click: Check.
It does: Updating cache.
Then says: There are no updates to install.
It says: New Ubuntu release '14.04.3 LTS' is available.
I click: upgrade.
Modal opens: Welcome to Ubuntu 14.04 'Trusty Tahr'
I click: Upgrade.
It says:
Upgrading Ubuntu to version 14.04
Preparing to upgrade...Third party sources disabled:
I click: Close.
Setting new software channels. Fetching files 48 of 52...
Could not determine upgrade... etc.
I click close.
Restoring original system state... dialog closes.
No upgrade.
I file this bug report.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.19
ProcVersionSignature: Ubuntu 3.2.0-89.127-generic-pae 3.2.69
Uname: Linux 3.2.0-89-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.9
Architecture: i386
Date: Thu Aug 20 23:46:40 2015
EcryptfsInUse: Yes
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1440110640
 com.ubuntu.update-manager show-details true
 com.ubuntu.update-manager window-height 670
 com.ubuntu.update-manager window-width 600
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2015-08-20 (0 days ago)
VarLogDistupgradeTermlog:

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


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

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https://bugs.launchpad.net/bugs/1487232

Title:
  trying to upgrade lts 12.04 to 14.04

Status in update-manager package in Ubuntu:
  New

Bug description:
  I run: sudo update-manager -d
  Update manager says: You must check for updates manually. Options: Check and Close.
  I click: Check.
  It does: Updating cache.
  Then says: There are no updates to install.
  It says: New Ubuntu release '14.04.3 LTS' is available.
  I click: upgrade.
  Modal opens: Welcome to Ubuntu 14.04 'Trusty Tahr'
  I click: Upgrade.
  It says:
  Upgrading Ubuntu to version 14.04
  Preparing to upgrade...Third party sources disabled:
  I click: Close.
  Setting new software channels. Fetching files 48 of 52...
  Could not determine upgrade... etc.
  I click close.
  Restoring original system state... dialog closes.
  No upgrade.
  I file this bug report.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.19
  ProcVersionSignature: Ubuntu 3.2.0-89.127-generic-pae 3.2.69
  Uname: Linux 3.2.0-89-generic-pae i686
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu17.9
  Architecture: i386
  Date: Thu Aug 20 23:46:40 2015
  EcryptfsInUse: Yes
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1440110640
   com.ubuntu.update-manager show-details true
   com.ubuntu.update-manager window-height 670
   com.ubuntu.update-manager window-width 600
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2015-08-20 (0 days ago)
  VarLogDistupgradeTermlog:

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