Laptops :: Compaq Armada 4125d

How can I make DSL use SVGA server for non compliant VESA

I have old xfree86:

Section "Device"
   Identifier  "Cirrus CL-GD7548"
   VendorName  "Cirrus"
   BoardName   "CL-GD7548"

   VideoRam    1024
   Chipset     "clgd7548"
#    Clockchip   "cirrus"
   Option "linear"
   MemBase 0x40000000
#    Option      "mmio"
#    Option      "fifo_conservative"
#    Option      "no_accel"
#   Option "no_bitblt"
EndSection

Section "Screen"
   Driver      "svga"
   Device      "Cirrus CL-GD7548"
   Monitor     "Compaq Armada 4120 TFT LCD"
   DefaultColorDepth 16
   Subsection  "Display"
       Depth       8
       Modes       "800x600" "640x480"
   EndSubsection
   Subsection  "Display"
       Depth       16
       Modes       "800x600" "640x480"
   EndSubsection
EndSection