[linux-audio-dev] Two or more monitors) Re: Project:modularsynth editor

[Martijn Sipkema]

[...]
> > IIRC Matrox cards have a way of making a single framebuffer (with
> > xinerama hints) that appears on two monitors. That way you should
> > get 3d accel on both displays.
> 
> ATI has something similar, but their drivers don't seem to work with 
> Xinerama the normal way. It (sort of) works though, and as long as I 
> don't try to throw extra cards in the mix, I can have two independent 
> desktops (separate buffers, separate pixel formats etc) and still run 
> OpenGL on both.

Most (all?) hardware will support this (and all should).

> There is another mode, where a single buffer forms a big desktop, of 
> which each RAMDAC displays a part. Seems like stupid driver 
> limitations restrict this mode to using the same resolution for both 
> heads, but I'm not sure.

It is to be expected that a single rendering context has only one
framebuffer configuration. "Consumer" hardware does not have a per
pixel framebuffer configuration stored in the framebuffer together with
the color (and possibly clipping) data; a rendering operation expects
a single config.

--ms