SVGA Monitor Identification Bits`

I give up: How does a Sony (FX-140) notebook recognize the presence of
an external (VGA/SVGA) monitor? Many Google hits on the topic provide
monitor ID bit identifications...and variations thereon. But NONE of
them seem to work. That is: Grounding the indicated pins, in all
possible combinations, does not cue the computer that a monitor is
connected. It cannot be that the FX-140 requires active communication
with a monitor, because the computer recognizes ANY connected monitor
(have tried 5) whether they are powered or not.

Any hints? Diodes between pins...resistors...holy water?
.

Relevant Pages

  • Re: Xorg+nvidia driver fail boot without monitor connected
    ... X runs an EDID query when it ... monitor is connected or tho force the TV as a monitor.... ... > connected monitor is a TV and that X should ignore CRT and DFP devices. ...
    (comp.os.linux.hardware)
  • VGA Monitor Identification Bits?
    ... an external (VGA/SVGA) monitor? ... Many Google hits on the topic provide ... monitor ID bit identifications...and variations thereon. ... because the computer recognizes ANY connected monitor ...
    (sci.electronics.repair)