You don't say if this this is for windows or  linux or some other OS.  While 
I've never set up FG with multiple monitors, I've configured 4 monitor 
systems on linux.

In general, you can't used more than two graphics cards with XFree86.  This 
appears to be a hardware limitation of bus speed or interrupts, at any rate, 
it doesn't work.  To get three monitor you will need a two GPU card and 
one GPU card.  The BIG problem is that X doesn't support 3D exceleration,
at least not if the monitors are bound together into one virtual monitor (the
mode we required for 4 heads).  Configuring the XF86config file is not for the 
faint of heart on such a system.  Also, forget using an AGP card, you have
to use PCI cards, as X will not work with a mixture.

 A "two headed" card really is a one GPU card with a split frame buffer 
and a 4 headed card is a 2 GPU card with 2 split frame buffers.  I really 
feal that this is misleading to the consumer.  X really only deals well with a 
one-to-one relationship with X server and GPU.

If I were going to try multi-head I'd do this.  First, forget three heads, go 
for two PCI cards.  To do three heads you would need a Four headed card and a 
one headed card (See above)  Start up a seperate X server on each card.  This 
will require a seperate XF86config file for each card, and, will probably 
require that the second X server be run as root (because you can't specifiy 
the XF86config file unless you are root).  Then, treat the second X server 
just as you would a second computer.  A little Googling will give you 
instructions on how to set up mulitple X servers.  The short answer is, you 
just specify a different vitural terminal and config file when starting it.

Ron

On Wednesday 01 September 2004 04:08, H�kan K�llberg wrote:
> Hello all!
>
> How do I set up flightgear with three monitors - left side view,
> instrument panel, right side view? Is it possible to do it on
> one computer with three 3D graphic adapters? How? I understand that the
> normal way to set it up is with three computers. But I don't know
> how to do it.
>
> I know that this was asked before, but I did not see an answer
> that I understood. Curtis told us to read README.IO, but I would
> be very happy if someone could write a README.multiview where
> the setup is explained explicitly.
>
> Thanks in advance!
>
>                               H�kan



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