Problem with xorg.conf

Hi guys,

I don’t know what i did with my config but if keep xorg.conf in /etc/X11 i can’t restart my tensorbook, I’ll be stuck at the start of the session.
My principle probleme is if i delete etc/X11/xorg.conf i can use my laptop but i will not able to configure nvidia-xconfig settings and add extra settings.
I tried to use xorg.conf backup , to reinstall nvidia but even with this if xorg.conf exists i can’t restart.
(sorry for my english)

Can you help me please ?

Best regards.