Installing Nvida DKMS way, what's the difference between /etc/X11/xorg.conf.d and /etc/X11/xorg.conf method?

[yudi v <yudi.tux@gmail.com>]

Hi,

I am trying to understand the difference between the following two methods

First method 
this taken from irc dpkg bot

"aptitude -r install linux-headers-2.6-`uname -r|sed 's,[^-]*-[^-]*-,,'` nvidia-kernel-dkms && mkdir /etc/X11/xorg.conf.d ; echo -e 'Section "Device"\n\tIdentifier "My GPU"\n\tDriver "nvidia"\nEndSection' > /etc/X11/xorg.conf.d/20-nvidia.conf"

this uses the xord.conf.d directory but it also has /etc/X11/xorg.conf  file. What happens in this case?

second method taken form http://wiki.debian.org/NvidiaGraphicsDrivers#Installation-1

first two steps are same as above:

- install linux-headers
- then nvidia-kernel-dkms

the third and forth step differ:

3rd step:  Install the NVIDIA X driver and user-space libraries

how come this is missing in the first option?


4th step: Configure X to use the nvidia driver

Editing /etc/X11/xorg.conf

Which method should I use?

-- 
Kind regards,
Yudi