I just got my display working, in fact it was a stupid error if myself, but I will post it to help the people who have the same problem in the future.
A few weeks ago I’d installed windows 7 on my desktop, it was a clean install so windows installed the most drivers by itself. It installed a standard display driver for a standard screen.
I just installed the original Nvidia drivers for my notebook, after reboot my Samsung U70 worked fine.
