Installing Nvidia Drivers

[sandyd]

I added it for more than once.

thats weird - its not in the above list

[NikTh]

I added it for more than once.

Add it again with the way @sandyd suggested. It is not in sources.list

Thanks

[Meschi]

Did you run apt-get update after adding the ppa? I forgot that and was wondering for a while

[Vesnog]

I managed to get it done, by first installing Ironhide then installing Bumblebee afterwards with the command:

sudo apt-get install bumblebee

Notice that I excluding bumblebee-nvidia seemed to have resolved the situation and I think I already got the Nvidia drivers then. I am marking the thread as solved, thanks everyone for help.