[CentOS] xorg.conf disappear

brick writes:
> Hi
> 
> My system is CentOS 6. I need to edit xorg.conf. But it can't be find in
> /etc/X11. Where is it? How can I get the default setting?

 /var/log/Xorg.0.log will tell you which configuration Xorg is currently
 using, which devices are autodetected etc. If you need to change only
 particular parts of the config, you can drop a .conf file with the
 corresponding Section into /etc/X11/xorg.conf.d.

 E.g. if you needed a UK keyboard instead of the default US, you could use
 something along the lines of

# cd /etc/X11/corg.conf.d
# cat keyboard.conf
Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option      "XkbModel" "pc105"
        Option      "XkbLayout" "gb"
EndSection
#