Multi-GPU Lucid Hydra On Linux: No Plans Yet

[d2globalinc]

Yah - the eyefinity stuff might save the day with a 6 port card, but I was unable to get 2 3port eyefinity cards to work correctly under ubuntu Karmic..

This has been the best we've accomplished:

http://www.youtube.com/watch?v=c1TOAXAbOAI

thread and info here:

http://ubuntuforums.org/showthread.php?t=884161

- Shane

[mtippett]

Last I checked Nivida SLI in linux only supports 2 GPU's and windows supports all 3.. to power one monitor.. also try enabling composite graphics and spanning 3 or more monitors across multiple GPU's in linux. It's been broken since Ubuntu Hardy, and the only way to get it to work is to use an outdated Xserver-XGL to do it.. Xinerama is not the answer because it also disables composite..

We have several clients that had to choose windows because they had 3 or more monitors.. Linux just can't do it right.

- D2G

With fglrx, you can do that with 3 monitors on shipping cards and up to six with future cards. It's one surface with RANDR viewports over it, so composite does work.

However, lots of apps get very confused about the "fullscreen" and mixture of xinerama and randr information. This makes compiz not quite the experience you'd expect.

[d2globalinc]

Last I checked Nivida SLI in linux only supports 2 GPU's and windows supports all 3.. to power one monitor.. also try enabling composite graphics and spanning 3 or more monitors across multiple GPU's in linux. It's been broken since Ubuntu Hardy, and the only way to get it to work is to use an outdated Xserver-XGL to do it.. Xinerama is not the answer because it also disables composite..

We have several clients that had to choose windows because they had 3 or more monitors.. Linux just can't do it right.

- D2G

[Pfanne]

I think with open technology like OpenCL we can implement OpenGL ontop of OpenCL and have instant crossfire/sli for any app.

which will probably run at 10% the speed if you just used opengl directly

[cruiseoveride]

I think with open technology like OpenCL we can implement OpenGL ontop of OpenCL and have instant crossfire/sli for any app.

[deanjo]

Such technologies are mostly gimmicks for the gaming market. Unless a thriving Linux gaming market pops up, tech. such as this will receive little support/interest.

Not necessarily true, anywhere where a high performance graphics workstation is needed multi GPU solutions can help greatly (Maya, PRO/e, even blender, etc). Also where the Hydra is a different solution is that unlike other competing technologies the method of rendering is very different the traditional slr/afr methods and could at least in theory could allow far more complex rendering.

[blackshard]

Such technologies are mostly gimmicks for the gaming market. Unless a thriving Linux gaming market pops up, tech. such as this will receive little support/interest.

That's the point.

[Melcar]

Such technologies are mostly gimmicks for the gaming market. Unless a thriving Linux gaming market pops up, tech. such as this will receive little support/interest.

[blackshard]

To play world of goo?

[deanjo]

Multigpu on linux to do what?

For the same reasons that you would have multi gpu on any other OS.