Lindsay Haisley supplied the following configuration file (/etc/X11/XF86Config-4) for xserver-xfree86. It is specific to the Dell CPi D300XT laptop with the standard Neomagic Chipset and the example here is a combination of the XF86Config-4 example provided with Gentoo Linux and Dell CPi D300XT laptop details.
For the Dell CPi with the NeoMagic video we do not need to specify a specific ModeLine setting--the X server determines that the VESA standard default video mode for the Neomagic video system in the Dell Latitude CPi D300XT should be as follows:
(**) NEOMAGIC(0): *Default mode "1024x768": 65.0 MHz, 48.4 kHz, 60.0 Hz (II) NEOMAGIC(0): Modeline "1024x768" 65.00 \ 1024 1048 1184 1344 768 771 777 806 -hsync -vsync
If you are using version 3 of the XFree86 server then the following modeline might help out:
Modeline "1024x768" 65 1024 1032 1176 1344 768 771 777 806 -hsync -vsync
The video system in this computer seems to be sufficiently flexible to accomodate either setting without apparent video alignment errors, however if your display appears to be misaligned, use the older Modeline setting to see if it solves your problem.
The options for the neomagic driver allow docked and external displays. Internal and external displays don't work together so you need to manually edit the XF86Config-4 file each time you change between the external and internal display. It is reported that having both enabled can destroy the internal display. It certainly makes it go pretty ugly momentarily.
Section "Files" RgbPath "/usr/X11R6/lib/X11/rgb" FontPath "unix/:7100" FontPath "/usr/X11R6/lib/X11/fonts/local/" FontPath "/usr/X11R6/lib/X11/fonts/misc/" FontPath "/usr/X11R6/lib/X11/fonts/75dpi/:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/100dpi/:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/Type1/" FontPath "/usr/X11R6/lib/X11/fonts/CID/" FontPath "/usr/X11R6/lib/X11/fonts/Speedo/" FontPath "/usr/X11R6/lib/X11/fonts/75dpi/" FontPath "/usr/X11R6/lib/X11/fonts/100dpi/" ModulePath "/usr/X11R6/lib/modules" EndSection Section "Module" Load "dbe" SubSection "extmod" Option "omit xfree86-dga" EndSubSection 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 EndSection Section "ServerFlags" Option "blank time" "10" # 10 minutes EndSection Section "InputDevice" Identifier "Keyboard0" Driver "keyboard" Option "AutoRepeat" "500 20" Option "Xleds" "1 2 3" Option "XkbModel" "pc105" EndSection Section "InputDevice" Identifier "Mouse0" Driver "mouse" Option "Protocol" "PS/2" Option "Device" "/dev/mouse" Option "Emulate3Buttons" Option "Emulate3Timeout" "50" EndSection Section "Monitor" Identifier "Dell SyncMaster 17GLi" HorizSync 31.5 - 48.5 # multisync VertRefresh 55-65 EndSection Section "Device" Identifier "NeoMagic" Driver "neomagic" BoardName "Unknown" # Option "Rotate" # Option "pciBurst" # Option "ShadowFB" # Option "NoStretch" # Option "LcdCenter" # Option "externDisp" # Uncomment this for external video Option "internDisp" # Uncomment this for internal video Option "overrideValidateMode" # Option "noMMIO" # Option "SWcursor" # Option "NoAccel" # Option "NoLinear" # Option "XaaNoScanlineImageWriteRect" # Option "XaaNoScanlineCPUToScreenColorExpandFill" EndSection Section "Screen" Identifier "Screen0" Device "NeoMagic" Monitor "Dell SyncMaster 17GLi" DefaultColorDepth 16 Subsection "Display" Depth 16 Modes "1024x768" "800x600" "640x480" EndSubsection EndSection Section "ServerLayout" Identifier "XFree86 Dell CPi D300XT" Screen 0 "Screen0" 0 0 InputDevice "Mouse0" "CorePointer" InputDevice "Keyboard0" "CoreKeyboard" EndSection