How can I get multiple video cards to work on linux?

Posted by user17943 on Super User See other posts from Super User or by user17943
Published on 2010-03-07T19:47:06Z Indexed on 2010/03/12 7:47 UTC
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I installed fedora 12.

I have 2 ATI cards that I used to use on windows to run 4 monitors. A recurring problem has been to get them detected in linux. Only my secondary card is picked up linux. When I manage the displays it detects the 2 monitors connected that card.

What are the specific steps I should take to get the second card detected? Supposedly there is a tool system-config-xfree. I don't have it, yum can't find it.

Also I heard it has something to do with editing some xorg.conf file or something to that effect. I have absolutely no idea how to find the "bus id" of my card, or lookup the horizontal refresh rates, etc..

I would probably have no problem following the documentation & editing the file if I knew a good way to find these values.

Someone also suggested installing linux twice and saving the xorg.conf it generates each time (with different card each time) and then merging the two by hand. That is like killing a fly with a hammer though, when I do this again and again in the future It'd be nice to not have to take twice as long.

Thanks

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