X server unable to start after installing the NVIDIA driver on GeForce GT630M.

After installing NVIDIA driver on my Acer aspire V3-571G (With a NVIDIA GeForce GT 630M graphics card) X server doesn’t starts, all the system boots fine but at the end I just get a black screen, Ctrl + Alt + fkeys still works, so I’m able to login as root user and shutdown the system. (Fedora 21 64bit (Workstation edition).

Bug report and nvidia-installer.log in the file attachments.
nvidia-bug-report.log.gz (108 KB)

nvidia-installer.log (255 KB)

That’s beacause you have Optimus, not only Nvidia Graphics.