as root I can startx withount any problem. however as the user I cannot.

I have not nouveau installed. I have installed the nvdia proprietary driver.

after these procedures  I have run #nvidia-xconfig #gl-select use xorg #gl-select use nvidia. I have reboot and added user to  group "video".

I have created a file inside the /etc/X11/xorg.conf.d directory and I have  named it like 10_device.conf with the nividia-xconfig configurations.

but as the user it fails if I try to startx

below is the pastebin of the  /etc/X11/xorg.conf.d/10_device.conf and /var/log/Xorg.o.log