Unable to upgrade from Lucid Lynx to Maverick Meerkat

Posted by Rafal on Ask Ubuntu See other posts from Ask Ubuntu or by Rafal
Published on 2011-02-08T19:55:42Z Indexed on 2011/02/08 23:34 UTC
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I have got a problem with Update Manager. I'm running Lucid Lynx ver. 10.04.2 and I'm unable to upgrade it to 10.10 version.

I have got this message when trying to upgr. :

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

I couldn't accidentally download pre-released updates or unsupported updates cause both of those options stays 'unticked' in software sources/updates, so that can't be that.

EDIT: Those options stayed disable. I have never enabled them.

Unofficial software packages then? If yes, how to find which of them I have to get rid off?

My current Ubuntu version is: 10.04.2 LTS

Thanks

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