This is a continuation of this question. I'm sorry, I couldn't add a comment there, so I wrote this new question. Gonzalo Medina solved the problem by defining a new \Section command. This cannot work with me. I'm using Lyx to create my beamer presentation and articles. So, I cannot tell Lyx to use the new defined \Section instead of the standard \section command.
So is there a way to redefine/patch either of the \section command or the toc so that the beamer-article toc uses section full title instead of the short title?
Thanks in advance