hi jituoracle,
Try editing your '/etc/X11/XF86Config-4' file, then start your X-server by `startx`. Following is my XF86Config-4: -
Section "ServerLayout"
Identifier "XFree86 Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
RgbPath "/usr/X11R6/lib/X11/rgb"
ModulePath "/usr/X11R6/lib/modules"
FontPath "/usr/X11R6/lib/X11/fonts/misc/"
FontPath "/usr/X11R6/lib/X11/fonts/Speedo/"
FontPath "/usr/X11R6/lib/X11/fonts/Type1/"
FontPath "/usr/X11R6/lib/X11/fonts/CID/"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi/"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi/"
EndSection
Section "Module"
Load "extmod"
Load "dbe"
Load "dri"
Load "glx"
Load "record"
Load "pex5"
Load "xtrap"
Load "xie"
Load "speedo"
Load "type1"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "keyboard"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/input/mice"
Option "Emulate3Timeout" "50"
Option "ZAxisMapping" "4 5"
Option "Buttons" "5"
EndSection
Section "Monitor"
#DisplaySize 310 230 # mm
Identifier "Monitor0"
VendorName "PHL"
ModelName "PHILIPS 107T"
Option "DPMS"
EndSection
Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "NoAccel" # [<bool>]
#Option "SWcursor" # [<bool>]
#Option "Dac6Bit" # [<bool>]
#Option "Dac8Bit" # [<bool>]
#Option "ForcePCIMode" # [<bool>]
#Option "CPPIOMode" # [<bool>]
#Option "CPusecTimeout" # <i>
#Option "AGPMode" # <i>
#Option "AGPSize" # <i>
#Option "RingSize" # <i>
#Option "BufferSize" # <i>
#Option "EnableDepthMoves" # [<bool>]
#Option "CrtScreen" # [<bool>]
#Option "PanelSize" # [<str>]
#Option "UseFBDev" # [<bool>]
Identifier "Card0"
Driver "ati"
VendorName "ATI"
BoardName "Radeon 7500 QW"
BusID "PCI:1:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "MONITOR0"
DefaultDepth 16
Subsection "Display"
Depth 24
Modes "1024x768"
EndSubSection
Subsection "Display"
Depth 16
Modes "1024x768"
EndSubSection
Subsection "Display"
Depth 8
Modes "1024x768"
EndSubSection
EndSection
Hope this will do you good.
vT