Triple/Quad screen options

[Hans du Plooy <koffiejunkielistlurker@koffiejunkie.za.net>]

Hi guys,

I'm Looking for your experiences using three or more monitors under 
Linux?  We use two to four screens at work (depending on our exact 
requirements).  Using two screens on a dual-head card works mostly OK, 
at least for my legitimate work needs (some things like fullscreen 
mplayer don't behave so nicely, but that's not essential), but as soon 
as you run three or more screens and have to use two graphics card, 
things get a little messy.  Xinerama, for one, breaks hardware 3D, and 
some things behave weirdly

I've looked online at cards like the Matrox G450 Quad, and wondered if 
anyone has experience running these under linux.  How well does things 
like 3D and hardwar everlay (as in MPlayer fullscreen with xv without 
trying to fullscreen over all the screens) work?

Thanks