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Old 09-09-10, 03:03 PM   #2
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Join Date: Jul 2005
Location: Munich
Posts: 910
Default Re: What are my options? Need three dual-link DVI outputs

Originally Posted by Xevious View Post
I currently use XGL + beryl.
Just to make sure: with XGL, do you actually mean "glx", say
running 3D applications using OpenGL?

Originally Posted by Xevious View Post
To my knowledge I can't use XGL over more than 1 GPU's. I believe this has to do with openGL rendering not working over multiple GPU's or something?
Ok, now I'm pretty sure you are refering to glx/OpenGL, because the
"XGL" I know can run on several GPUs :-)

Originally Posted by Xevious View Post
Does nvidia have any tripple head cards now (I am a bit behind on some of the newer cards) that will actually run three displays off a single GPU like ati has (that do 3, 5, 6, and 12) now?
Not to my knowledge - there are cards with four outputs, but then with two GPUs
on the same board.

Originally Posted by Xevious View Post
I originally had given up on getting both monitors running at once (via three dual link DVI connections) so I was thinking of trying to buy some sort of splitter cable so I can simply switch between the monitor's depending on the X session but I have a feeling this won't work good.
Normally, the X-Server should be able to scope with that, but I wouldn't
be that sure when taking your very special setup into account :-)

Originally Posted by Xevious View Post
I am thinking the best option would be to do what I am doing now but have the 30 inch monitor run off a separate video card that my separate X session runs in and thus just switch between them (just use the 30 incher for when I game). I assume I will have no problems doing this. Of course this means I can never use both monitor's at once.

Can I still make use of both monitors at once by not doing xinerama and have two separate X sessions running at once?
I seem to recall it was possible to do this and the two monitor's have different programs running and thus you can't drag/drop between the two but I could at least still use both at once? This might be a good compromise as I would like to use both monitor's at once (even if they can't interact with each-other) if possible.
Two cards with separate X-screens should work, however usability
is limited as you already pointed out.

Originally Posted by Xevious View Post
Anyone have any suggestions for getting the most use out of both monitors (Ideally being able to use both at once).

Having one big desktop that scales both monitor's would be the best option but to my knowledge that is currently impossible if I want to use XGL/beryl and have good window rendering performance (I kinda wanna say 2d performance but its actually rendered in 3d).
There are a number of options:

1. Try to get "XGL" working. Please note that XGL is not a synonym
for glx or OpenGL. XGL is an "overlay X-server" that would basically
fullfill your requirements, but unfortunately XGL is unsupported since
2008. It would be really a pretty nice solution, i.e. the following video
shows how XGL operates on six LCDs with three nvidia cards:

2. Get two Quadro 5600FX cards and use SLI Mosaic: the latest
driver does support SLI Mosaic not only for QuadroPlex boxes but
also for newer Quadro cards. However, those parts are not exactly
cheap :-)

Originally Posted by Xevious View Post
I probably have the weirdest setup of anyone out there.
I tend to say it's pretty unique :-)


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