[Bug 1372040] Re: cannot update to 14.04 from 12.04

[Alexie]

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 determine 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 

If none of this applies, then please report this bug using the 
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. 


I tried this 3-4 times. I disabled all non-canonical ubuntu repos in
/etc/apt/sources.d/*

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https://bugs.launchpad.net/bugs/1372040

Title:
  cannot update to 14.04 from 12.04

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

Bug description:
  Update-manager tells me that I cannot upgrade to 14.04 (something
  about cannot determine the sources?)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.17
  ProcVersionSignature: Ubuntu 3.5.0-44.67~precise1-generic 3.5.7.25
  Uname: Linux 3.5.0-44-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu17.7
  Architecture: amd64
  Date: Sun Sep 21 18:17:26 2014
  GsettingsChanges:
   com.ubuntu.update-manager check-new-release-ignore 'trusty'
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1411287291
   com.ubuntu.update-manager window-height 600
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   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 2014-09-21 (0 days ago)
  VarLogDistupgradeTermlog:

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