I tried setting the resolution to 2000x1536 as the EDID return suggests, but that just gives an "unknown mode" error (verbose log file attached).
That's expected - X doesn't know about that mode. You'd have to write a modeline for it.
So it seems that the EDID is returning bogus values doesn't it. I tried setting the Nvidia driver option "IgnoreEDID" "true" as suggested in the README and used the following values which seem to work with the XFree driver:
hsync 31.5 - 57.0, vrefresh 50.0 - 70.0,
However, as usual I get a screen with horizontal patterns. I'll attach the log for that with the next message.
Something doesn't seem quite right. Do other modes work?