"CrtScreen"은 도로 주석 처리하시고, 아래와 같이
Screen 1 또는
Screen 0 을 추가해보세요.
  # XFree86 4.2.0 configuration generated by Xconfigurator 4.10.7
 Section "ServerLayout"
	Identifier "XFree86 Configured"
	Screen      0  "Screen0" 0 0
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"
EndSection
 # Red Hat Linux 6.0 and later use the xfs font server for improved
# interactive performance
 Section "Files"
	FontPath "unix/:7100"
EndSection
 # Module loading section
 Section "Module"
	Load  "dbe"		# Double-buffering
	Load  "GLcore"		# OpenGL support
	Load  "dri"		# Direct rendering infrastructure
	Load  "glx"		# OpenGL X protocol interface
	Load  "extmod"		# Misc. required extensions
	Load  "v4l"		# Video4Linux
	# Load  "record"	# X event recorder
	# You only need the following two modules if you do not use xfs.
	# Load  "freetype"	 # TrueType font handler
	# Load  "type1"		# Adobe Type 1 font handler
EndSection
 Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "keyboard"
	Option      "XkbLayout"	"us"
EndSection
 Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option      "Device" "/dev/mouse"
	Option      "Protocol" "PS/2"
	Option      "Emulate3Buttons" "on"
	Option      "ZAxisMapping" "4 5"
EndSection
 Section "Monitor"
	Identifier "CustomConfiguration"
	VendorName "Unknown"
	ModelName  "Unknown"
	HorizSync 31-81
	VertRefresh 56-85
	Option "dpms"
EndSection
 Section "Device"
	Identifier "ATI Radeon 7500"
	Driver "radeon"
	BoardName "Unknown"
	BusID "PCI:1:00:0"
# Some 7500 boards aparently need this option enabled to work - bug (#62760)
#	Option "CrtScreen"
	Screen 1
EndSection
 Section "Screen"
	Identifier "Screen0"
	Device "ATI Radeon 7500"
	Monitor "CustomConfiguration"
	DefaultDepth 16
	Subsection "Display"
		Depth 16
		Modes "1280x1024"
	EndSubSection
EndSection
 Section "DRI"
	Mode 0666
EndSection