G200MMS Multiple Monitor Positions in the Registry

[nykris]

We have been trying to align four monitors connected to a Matrox G200MMS card so that they form a 2x2 square. If we set each monitor to 640x480 resolution this works fine, but if we set them to 800x600 (which is what we want) then whatever we do the top-right monitor is offset 8 pixels to the right (ie it should be at coordinates 800,600 but is actually at 808,600). Matrox tech support have duplicated the problem and can offer no solution to it, but it occurs to me that these coordinates for each monitor must be held in the registry somewhere, otherwise how would the computer know where to position each monitor on a restart?

So my question is - does anyone know which registry entry contains the position of the multiple monitors, and what format is the data in?

Alternatively if you know how to align the screens without editing the registry by hand then I would love to hear from you :-)

Thanks,

Graham Bartram

[orangejulius]

http://support.microsoft.com/support/kb/articles/Q290/3/81.ASP