Para sistemas com configurações menos convencionais (como minhas máquinas aqui), o X tem dificuldade de identificar os dispositivos corretamente. Este artigo é voltado para aqueles que tem uma breve idéia de como configurar o X mas tem encontrado problemas para configurar video e mouse.

Para descobrir o nome e o Busid de uma placa de video, use:
$ lspci | grep VGA

O arquivo xorg.conf pode ser encontrado em /etc/X11/xorg.conf

Section "Device"	# nVidia Corporation GeForce 6100 nForce 430 (rev a2)
	Identifier	"VC0"
	Driver		"nv"
	Busid		"PCI:0:13:0"
EndSection
Section "Monitor"	# AOC 917 Vw
	Identifier	"M0"
EndSection
Section "Screen"
	Identifier	"S0"
	Device		"VC0"
	Monitor		"M0"
	Defaultdepth	16
	SubSection "Display"
		Depth	16
		Modes	"1440x900"
	EndSubSection
EndSection

Section "Device"	# nVidia Corporation NV11 [GeForce2 MX/MX 400] (rev b2)
	Identifier	"VC1"
	Driver		"nv"
	Busid		"PCI:1:06:0"
EndSection
Section "Monitor"	# ViewSonic VE175
	Identifier	"M1"
	Horizsync	64
	Vertrefresh	60
EndSection
Section "Screen"
	Identifier	"S1"
	Device		"VC1"
	Monitor		"M1"
	Defaultdepth	16
	SubSection "Display"
		Depth	16
		Modes	"1280x1024"
	EndSubSection
EndSection

Section "Device"	# nVidia Corporation NV43 [GeForce 6600 GT] (rev a2)
	Identifier	"VC2"
	Driver		"nv"
	Busid		"PCI:2:0:0"
EndSection
Section "Monitor"	# AOC 917 Vw
	Identifier	"M2"
EndSection
Section "Screen"
	Identifier	"S2"
	Device		"VC2"
	Monitor		"M2"
	Defaultdepth	16
	SubSection "Display"
		Depth	16
		Modes	"1440x900"
	EndSubSection
EndSection

Section "Device"	# Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter
	Identifier	"VC0"
	Driver		"sis"
	Busid		"PCI:1:00:0"
EndSection
Section "Monitor"	# DELL 17" CRT
	Identifier	"M0"
	VertRefresh	75
	HorizSync	80
EndSection
Section "Screen"
	Identifier	"S0"
	Device		"VC0"
	Monitor		"M0"
	DefaultDepth	16
	SubSection "Display"
		Depth	16
		Modes	"1280x1024"
	EndSubSection
EndSection

Section "Device"	# nVidia Corporation NV11 [GeForce2 MX/MX 400] (rev a1)
	Identifier	"VC1"
	Driver		"nv"
	Busid		"PCI:0:09:0"
EndSection
Section "Monitor"	# LG Studioworks 700S
	Identifier	"M1"
	VertRefresh	60
	HorizSync	64
EndSection
Section "Screen"
	Identifier	"S2"
	Device		"VC2"
	Monitor		"M2"
	DefaultDepth	16
	SubSection "Display"
		Depth	16
		Modes	"1280x1024"
	EndSubSection
EndSection

Section "Device"	# nVidia Corporation NV11 [GeForce2 MX/MX 400] (rev b2)
	Identifier	"VC2"
	Driver		"nv"
	Busid		"PCI:0:11:0"
EndSection
Section "Monitor"	# MAC Vision 19"
	Identifier	"M2"
	VertRefresh	75
	HorizSync	80
EndSection
Section "Screen"
	Identifier	"S2"
	Device		"VC2"
	Monitor		"M2"
	DefaultDepth	16
	SubSection "Display"
		Depth	16
		Modes	"1280x1024"
	EndSubSection
EndSection

Section "InputDevice"	# Logitech Mouse Series 9 Serial CC-93-9F (ligado em COM1)
	Identifier		"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"	"/dev/ttyS0"
	Option		"Protocol"	"Logitech"
EndSection

Section "InputDevice"	# Mouse PS/2 convencional
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"ZAxisMapping"		"4 5"
	Option		"Emulate3Buttons"	"true"
EndSection

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