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Old 03-24-2011, 07:20 AM   #1
Registered: Jan 2007
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Triple Monitors Xorg with AMD&NVIDIA: XRANDR and Xinerama not working.

I'm trying to set up a tri monitor setup. Unfortunately I must use 2 cards, one an AMD HD4350 and a PCI Geforce FX200. (Old skool I know)

Due to the restrictions, I am forced to use the open source drivers (else nvidia glx will clash).

As I see it, I have 2 solutions available to me:
1: Use XRANDR to span the displays (this is what I did previous to the introduction of the third monitor and nvidia card to my system)
I tried to do this, by setting up a second X screen on the NVIDIA card, disabling Xinerama; but after much googling I can't figure out the syntax for panning across 2 screens (X screens) in XRANDR, even tho it's >1.3, which supposedly supports multi card output.

2:Use Xinerama, sacrificing randr, and composite extensions.
I also attempted to do this, with some limited success. I could get the NVIDIA screen to be right of the ATI, but I couldn't get 2 independent outputs running on the ATI card, even with "ZapohHeads" appended to one of the device sections for my ATI card.

Any suggestions to how I can sort this?

I'm amazed there's not a way to have mixed nvidia/radeon on X11 in 2011.


Last edited by kernel_geek; 03-24-2011 at 01:48 PM. Reason: [SOLVED]
Old 03-27-2011, 02:07 PM   #2
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Left/Right works fairly well. You may be able to add centre (or center as it is also spelled )

I would go with the ATI card, 2 monitors, left and right; then try to get anything up on nvidia. A key thing to set is Virtual screen size. So if you had 2x 1024x768 screens, your Virtual screen would be
Virtual 2048 768

Just add them all in a section in xorg.conf and X won't complain if they are missing


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