From LQWiki

xorg.conf

Default xorg.conf from Ubuntu 8.04

---

Section "InputDevice"
	Identifier "Generic Keyboard"
	Driver	"kbd"
	option	"XkbRules"	"xorg"
	option	"XkbMode1"	"pc105"
	option	"XkbLayout"	"us"
Endsection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver	"mouse"
	Option	"CorePointer"
EndSection

Section "Device"
	Identifier	"Configured Video Device"
EndSection

Section	"Monitor"
	Identifier	"Configured Monitor"
EndSection

Section	"Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
EndSection