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