Hello everyone.  I can't get a dual-head configuration using an AGP G550 
and a PCI G400 working under either XFree 4.2.0 or 4.2.1 with either the 
XFree mga driver or the Matrox mga driver.  (I am also asking Matrox 
about this.)

The system in question is a mostly-stock Red Hat 7.3 installation, with 
the XFree 4.2.1 binary upgrade installed atop the Red Hat XFree 4.2.0 
packages.

Some things I've tried:

1) In the bios, one card is anointed the "primary" display adapter. 
Whichever card so anointed works fine; the other does not produce any 
video in X, with no errors reported (it is like the card is switched off).

2) I tried moving the PCI card to a different slot, which made no 
difference in any perceptible way (PCI id stayed the same).

3) The cards don't work in any color depth that I tried -- I need 
overlay support for this workstation because we have some brain-dead 
apps that require PseudoColor, but it won't even work with both displays 
in 8 bit, Xinerama or no, DRI or no (which shouldn't work anyway, but I 
did explicitly turn it off).

4) Using the Matrox drivers, both displays turn on but the secondary has 
some serious psychedelic visuals on it and the first has some mouse 
pointer issues.  Personally, I'd rather use the XFree drivers if they 
can be made to work.

Does anyone have any experience getting two of these cards to work 
together?  Perhaps the Red Hat kernel is causing problems?

Any advice, suggestions, or questions appreciated.

Thanks in advance,

Matt Mitchell
Systems Programmer
Geophysical Development Corporation

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