X refuses to start Headless 3D

[Ata Roboubi]

I got it working :-)

This is the important section of my xorg.conf:
####################################

Section "Monitor"

   #Option         "DPMS"
   Identifier     "Headless"
   HorizSync       80.0 - 80.0
   VertRefresh     75.0
#
#   Used command line:  gtf 1280 1024 75
#   to come up with following Modeline:
   Modeline "1280x1024_75.00"  138.54  1280 1368 1504 1728  1024 1025
1028 1069  -HSync +Vsync

EndSection

Section "Device"
   Identifier     "NVIDIA Corporation NVIDIA Default Card"
   Driver         "nvidia"
   Option         "ConnectedMonitor" "CRT-0"
   Option "UseEDID" "FALSE"
EndSection

Section "Screen"
   Identifier     "Default Screen"
   Device         "NVIDIA Corporation NVIDIA Default Card"
   Monitor        "Headless"
   Option "UseEDID" "FALSE"
   DefaultDepth    24
   SubSection     "Display"
       Depth       24
       Modes      "1280x1024"
   EndSubSection
EndSection

###################################

These documents were helpful:

http://markbrewster.wordpress.com/2010/02/04/ubuntu-9-10-not-starting-up-at-full-resolution-with-tv-turned-off/
http://us.download.nvidia.com/XFree86/Linux-x86/173.14.09/README/appendix-b.html
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/x-config.html

Ata.