I solved the problem
the solution is here
I've never had to do that before but it work fine
No, not the best solution! And beside that, the xorg PPA doesn't contain any Nvidia drivers. All Nvidia drivers are moved to here: https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa.
Please, before responding and providing solutions, please check them first if they are still applicable, up-to-date, valid and maintained! In this case, referring to the xorg PPA using a link to a website is a) not valid b) not applicable.
Also, building a driver without good knowledge of Linux systems will only lead to broken systems. Also, the driver downloaded ffrom the Nvidia website is a generic driver not specific meant for Ubuntu-based distributions/derivatives. The change of breaking a system either by running a wrong command or by the driver not compiled correctly is a real threat here. Therefore it is much wiser to refer to the graphics-drivers PPA:
sudo add-apt-repository ppa:graphics-drivers/ppa
Now go to your Device Driver Manager and install the Nvidia driver which is marked as recommended. Nothing can go wrong here!