Comment 5 for bug 238533

I have the same problem too when updating to the Envyng 185 drivers in Ubuntu 9.10.
The problem is that it will not recognize the EDID from the display.
See this link:
http://www.nvnews.net/vbulletin/showpost.php?p=2118873&postcount=22
"The Problem
For some reason, the current nvidia driver does not auto-detect that a display is attached to an internal digital port. Even if you force the driver to assume a display is attached, it is still unable to read the EDID information from the display. It is this information which tells the driver how to drive the display. Starting X yields just a blank screen."

I have not yet figured out how to use the softMCCS program or the Phoenix EDID designer software yet.

System.
Sony Vaio CW series laptop. Intel I5 Core, Nvidia 330m 512MB