[Bug 1237524] Re: Can not upgrade to 13.10 from 13.04

[aliander]

*** This bug is a duplicate of bug 1241420 ***
    https://bugs.launchpad.net/bugs/1241420

Manually removing unity seems to do the trick - not sure if this bricks something :/
Source: http://askubuntu.com/a/360738

To be precise, I'm currently on XUbuntu, so I'm not quite sure why I
even have unity installed (didn't do this on purpose AFAIR) and I don't
know if removing would be more trouble on a vanilla Ubuntu System

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1237524

Title:
  Can not upgrade to 13.10 from 13.04

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

Bug description:
  I wanted to do an upgrade from 13.04.

  So I sued this commend

  sudo update-manager -d
  But I got this error

  Could not calculate 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

  Then I disabled all ppa's same problem

  you can see this as well
  http://ubuntuforums.org/showthread.php?t=2179674&p=12811773#post12811773

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1237524/+subscriptions