[lug] 2 video cards rh 7.2

D. Stimits stimits at idcomm.com
Sat Mar 2 00:35:37 MST 2002


j davis wrote:
> 
> Hi all,
>   I have a box running RedHat 7.2 the box has the defults except for
> kde and lilo....anyway i have been trying to use two video cards without
> any luck ...one card is ati radeon 64 sdr(agp 4x) other is a crappy
> pci trident. My comp is dual boot and both cards work fine in win98
> but in linux i can only get one or the other depending on how i set my bios
> (award bios on asus a7a266-alimagik). I have tried verious edits on
> /etc/X11/XFree -4 ...(thats not the exact name of file but you get it  im
> sure)...no luck. Can someone pleas help

I have never had multiple monitors or cards on one machine, but had
wanted to long ago, so looked into a few details. Some cards do not work
well together, some do, looks like yours are at least capable of it.
Some of the choices are multiple X11 servers on a single machine, one
server for each card, they do not share a desktop. Another is Xinerama
under XFree86 4.x, but this often requires much more similarity in video
card chipset compatibility, e.g., the Oxygen VX-1 has both pci and agp
versions that are actually intended just for this (well, for accurate
OpenGL rendering, but their forte is not speed, instead it is stability
running with up to 8 of them at once on a single machine). I think the
NVidia AGP cards should work with the older TNT2 cards on the pci, at
least for 1 TNT2, under Xinerama. A lot of other card combinations I
think do not work under Xinerama. The Xi Graphics servers are supposed
to handle multi-head quite well, but you might find they also have
restrictions on which video chipsets work together (I haven't looked
into that in a long time). If you do use Xinerama on XFree86 4.x, I
think the bleeding edge is probably more likely to support your cards
(still no guarantee, I have not looked at this in a long time).

A URL you might find of interest:
http://www.realtimesoft.com/multimon/linux/

D. Stimits, stimits at idcomm.com

> 
> jd
> 
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