With xorg-server-1.8, the file /etc/X11/xorg.conf is deprecated. Though we can actually reserve it for user modifications, it's no longer edited automatically.
The configuration files are now in /etc/X11/xorg.conf.d. To ensure that the users configuration will not be erased by a system upgrade, here's a suggestion of numbers and content. The configuration files are read in alphanumerical order and their names must end with .conf :
Some of the x0 sections are configured by tazx xorg-config using a template xorg.conf file (generated with Xorg -configure). You can find more information about this in the function xorg_conf_d of tazx.
If you want add a configuration file to a package, please take care to use a name different from those specified by tazx or this file will be erased when booting in live mode. You can use the same number (x0) with a different name if this configuration doesn't conflict with those used by default. Otherwise, use (x-1)5 for that configuration overwriting the default one.
Examples :
This avoid naming two files identically, you can use these in the /etc/X11/xorg.conf.d/readme for users with the 4.0 release.
tazx :
tazhw :
xorg-xf86-input-evdev :
xorg-xf86-input-synaptics :