[Bug 1241023] Re: can't upgrade to saucy

[ErikBerglund]

The problem appears to be related to some PPAs. I found this post helpful:
http://askubuntu.com/questions/202730/how-to-fix-the-unable-to-calculate-upgrade-issue-when-upgrading-from-12-04-to

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https://bugs.launchpad.net/bugs/1241023

Title:
  can't upgrade to saucy

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Confirmed

Bug description:
  sudo do-release-upgrade terminates with this output:

  Fetched 30.4 MB in 6s (53 B/s)

  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. 

  
  Restoring original system state

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

  None of the above information applies.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: ubuntu-release-upgrader-core 1:0.192.13
  ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
  Uname: Linux 3.8.0-31-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  CrashDB: ubuntu
  Date: Thu Oct 17 16:41:04 2013
  InstallationDate: Installed on 2012-05-06 (529 days ago)
  InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to raring on 2013-10-17 (0 days ago)

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