Re: [PATCH] "faked" Xinerama information for a triple-head TwinView setup
What combination of video cards are you using? It may highly depend on that!
the xserver patch integrates perfectly in 1.2.0 and works like a charm, so the risk should be low (at least with gentoo linux where everything gets compiled anyway)
I read that the best setup for triple head x is to have a mainboard with two AGP/PCI-E slots and same video cards.
not sure about ati but nvidia's drivers support this and even claim to give you acceleration and opengl (on every head).