On Sat, May 08, 1999 at 07:57:58PM -0700, Joseph Carter wrote: > On Sat, May 08, 1999 at 09:32:05PM -0500, Brian Servis wrote: > > Many modern monitors are 'plug-n-play'. I don't know how it all works > > but they are able to tell the video card/drivers what frequencies they > > support, etc. 'Plug-n-play' could be tried first, then either ask or > > guess conservative. > > That's all fine, but did we ever find out if someone were crazy enough to > pay for the PnP monitor specs (wasn't it $300 or so?) that an > implementation could be done and properly documented source released? > Reverse engineering this just does not sound like fun.
Someone said on another mailing list that Display Data Channel (DDC) is implemented in (recent versions of) XFree86. DDC is a Vesa standard that (I gather) lets the monitor talk to a computer, and is the protocol behind "Plug'n'Play" monitors. I don't know anything more about DDC, or how it is used in XFree86. I asked for further pointers and did not receive a reply. I imagine the XFree86 sources would have some hints, however. Andrew
