looks like it is unable to generate/probe/determine any valid modes (mode pool is empty), and so unloads the drivers - thus X can't find any screens and fails to initialise....
don't really know why, but I'm assuming that there is an option you can use in xorg.conf to tell it not to detect the monitor.
also, check that UseEDID is set to false - that's the default, and the messages don't mention the EDID process is starting, but its worth a try
finally, maybe turning off some of the ModeValidation options (or use the "No..." version of the option to disable it", or even set UseExactModeTimingsDVI to false - you are trying to prevent the mode validation process from running so that all the default modes are not eliminated from the mode pool.... if you can get that to happen then it will leave the drivers initialised, select a mode and start up X.... however there is no guarantee that the mode selected will work with any monitor you subsequently plug into it