下記機種のXの動作確認が取れました。
1400x1050で表示可能です。


手順１．
　nVIDIAのホームページから
　　NVIDIA_GLX-1.0-3123.src.rpm
  　NVIDIA_kernel-1.0-3123.src.rpm
　を持ってきて、
　　rpm --rebuild NVIDIA_kernel-1.0-3123.src.rpm
    rpm -ihv NVIDIA_kernel-1.0-3123.i386.rpm

    rpm --rebuild NVIDIA_GLX-1.0-3123.src.rpm
    rpm -ihv NVIDIA_GLX-1.0-3123.i386.rpm
　でインストールする。


手順２．
  /etc/X11/XF86Config-4を添付のように変更する


-------XF86Config-4

# 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"	"jp"
	Option      "XkbModel"	"jp106"
EndSection

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option      "Device" "/dev/mouse"
	Option      "Protocol" "IMPS/2"
	Option      "Emulate3Buttons" "off"
	Option      "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
	Identifier "Generic Laptop Display Panel 1400x1050"
	VendorName "Unknown"
	ModelName  "Unknown"
	#HorizSync 31.5-90
	HorizSync 31-150
	#VertRefresh 59-75
	VertRefresh 55-120
	Option "dpms"
EndSection

Section "Device"
	Identifier "NVIDIA GeForce 2 (generic)"
	Driver "nvidia"
	BoardName "Unknown"
EndSection

Section "Device"
	Identifier "Linux Frame Buffer"
	Driver "fbdev"
	BoardName "Unknown"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device "NVIDIA GeForce 2 (generic)"
	Monitor "Generic Laptop Display Panel 1400x1050"
	DefaultDepth 16
	Subsection "Display"
		Depth 24
		#Modes "1280x1024"
		#Modes "1024x768"
		Modes "1400x1050"
	EndSubSection
	Subsection "Display"
		Depth 16
		#Modes "1024x768"
		#Modes "1280x1024"
		Modes "1400x1050"
	EndSubSection
	Subsection "Display"
		Depth 8
		#Modes "1024x768"
		#Modes "1280x1024"
		Modes "1400x1050"
	EndSubSection
EndSection

Section "DRI"
	Mode 0666
EndSection