e.g. with this nvidia-post I got voted up or voted down, because this solution only works for CUDA optimus cards of nvidia - when bumblebee is added as repo.
( http://askubuntu.com/questions/297030/nvidia-frickle-with-hybrid-chipset-is-now-over-finally )

So here it is not correct then - to be voted down several times by others, who did not succeed with this solution ( one or two did succeed ). Yes, I got voted down too, because this was not posted as question, instead posted like a blog. I only want to say, that it is sometimes tricky to post the correct solution as anwer for one topic, when several users don't know how to handle this solution, and then are voting somebody down, when they have "somehow no luck" with an answer.

- in future I will pay attention more to post more "compact" answers to avoid being mis-rated.

- there should be an option too in board of askubuntu, to mark a question/solution with being dependent on certain hardware - resp. marked with a hint, that one has to take care of it, because it is somehow case-sensitive like with nvidia ?!