The default setup for the Solaris 10 x86 Xorg server is to run without
an /etc/X11/xorg.conf file - the server will try to automatically detect
all configuration settings at X11 server start up time.
You can install your own /etc/X11/xorg.conf to overwrite the auto
configured settings. A template for xorg.conf can be created
by running /usr/X11/bin/Xorg -configure from the ascii console
(outside the GUI).