Dual Monitor issues

[andyf]

Anyone had a problem where, after enabling dual monitor support, their DirectX software goes all wrong and starts seeing the wrong display as being Direct3D enabled and not the primary one, or only seeing one as being able to render Direct3D ?

[John Bennett]

I guess it depends on your card and drivers. I know that ATI cards wouldn't accelerate OpenGL across multiple monitors, which caused me some grief when trying to write windowed 3D software.

[Vez]

If you want video acceleration, and d3d acceleration on both monitors you have to set the display to the anoying setting where the popup boxes appear in the middle of the two screen, i.e. the inner monitor edges...

That make any sense?