Triple head?

[DJ Delorie]

I have a quad-monitor setup.  I originally had two nVidia 9800GT cards
(dual DVI each) but in order to get more than one GPU to act like one
desktop, you had to use Xinerama, which slowed down Cairo a *lot*
(although 3D was still pretty fast).  I ended up replacing those two
cards with one Matrox M9148 (quad displayport) card.  It works, but you
need a proprietary driver, and the most recent version of Fedora they've
tested it with is Fedora *11*.  It does not compile with Fedora 14.
Also, it hangs fairly regularly (F12/F13) when watching V4L (like
tvtime).  2D (cairo) is very fast over all four monitors, and 3D is not
too shabby either (30-60 FPS in quake3).  The RandR settings in my setup
are off by a pixel, but I have three different monitor configurations
(one bigger than the others, and two of those others rotated - the
rotated ones are the ones that are off).