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Old 12-16-08, 05:42 AM   #13
Big P
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Default Re: 180.16 64bit Xinerama

Quote:
Originally Posted by dillzz View Post
No ideas from anyone regarding previous post and Google summer of code and xrandr 1.3?
Well, summer of code ideas are just that - ideas. Unless someone actually has an interest in doing it, don't expect it to get done.

Regarding randr 1.3 and the nvidia drivers, there was a post on Phoronix recently about nvidia adding randr 1.2 support to their binary (and most likely move to randr 1.3 from there). But I would be hard pressed to say anything that they post is reliable.
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Old 12-20-08, 03:04 PM   #14
xianthax
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Default Re: 180.16 64bit Xinerama

i'm in same boat, i have a similar setup, 4 x 24" screens, 1920 x 1080, 2 x 8600 GTS cards using xinerama. There is nothing nvidia can really do at this point to fix this properly, the support needs to be in the X server first to really fix the problem. Is it really a big deal tho? it's just a cosmetic glitch, doesn't cause any system shuddering for me at least. I'd rather nvidia spend more like improving 2D and 3D performance (180.16 was a huge 2D boost for me over stable )

i believe the appropriate solution will come when Xrandr completes GPU object support and corresponding support in the nvida driver for that version of randr. This would allow the gluing of multiple GPU's together and more appropriate buffer mapping, hopefully with compositing support.

I believe there will always be "some" additional chop when moving between GPUs on setups such as mine. There is a limitation for nvidia cards at a buffer size of 4096 x 4096 (i believe this is still true), for instance 4 screens @ 1980 horizontal each, obviously breaks this, which would keep each card from storing a complete frame buffer thus there would need to be a copy operation when moving a window over the gpu boundary.....

cheers,

x
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Old 01-02-09, 08:43 AM   #15
JaXXoN
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Default Re: 180.16 64bit Xinerama

Just to let you know, stumbled over this one - amazing! :-)

http://www.youtube.com/watch?v=1DWzuIreDGA

Here are the instructions:

http://meandubuntu.wordpress.com/200...ama-on-nvidia/
http://ubuntuforums.org/showthread.php?t=884161

However, since XGL has been abandoned, i fear this is nothing you would
like to use in a production system - what a pity. Maybe XGL could get a new
driver by this?

Bernhard

Last edited by JaXXoN; 01-02-09 at 08:46 AM. Reason: Fixed URL
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Old 01-02-09, 10:25 AM   #16
Thunderbird
 
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Default Re: 180.16 64bit Xinerama

The best way right now is to just use xinerama + twinview (yes you lose composite) together with the fakexinerama library. The best would be for someone to patch the fakexinerama library so that it uses info from nv-control and that way you can truly build your own xinerama implementation which works correctly.
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Old 01-02-09, 10:59 AM   #17
xianthax
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Default Re: 180.16 64bit Xinerama

Quote:
Originally Posted by JaXXoN View Post
Just to let you know, stumbled over this one - amazing! :-)

http://www.youtube.com/watch?v=1DWzuIreDGA

Here are the instructions:

http://meandubuntu.wordpress.com/200...ama-on-nvidia/
http://ubuntuforums.org/showthread.php?t=884161

However, since XGL has been abandoned, i fear this is nothing you would
like to use in a production system - what a pity. Maybe XGL could get a new
driver by this?

Bernhard
XGL is gone and won't be coming back....you can try to get it working but the last guy i heard about trying to recreate this setup ran into major stability issues due to the XGL.

as i said in my last post, if you want this fixed you need to go petition the XRandR guys to complete "GPU Object" support then get Nvidia to support it in their driver. This will allow arbitrary binding of GPU's together.

-x
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Old 01-02-09, 11:33 AM   #18
JaXXoN
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Default Re: 180.16 64bit Xinerama

Quote:
Originally Posted by xianthax View Post
you need to go petition the XRandR guys to complete "GPU Object" support then get Nvidia to support it in their driver.
This doesn't sound like something that is going to happen, soon ...

I guess it would be much easier to fix XGL, instead.
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Old 01-05-09, 07:03 AM   #19
JaXXoN
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Default Re: 180.16 64bit Xinerama

Quote:
Originally Posted by dillzz View Post
All three of my monitors are running at 1920x1200 so no go with the TH2G.
BTW.: TH2G now supports up to 2x 1920x1200@60Hz:
http://www.matrox.com/graphics/en/pr...solutions.html

So a 3x 1920x1200 single card setup should work (2x 1920x1200 LCDs on the
first DVI-D ouput via TH2G and one 1920x1200 LCDs on the second DVI-D).

In this context: TH2G now also supports 3x 1680x1050, so with two DVI-D
outputs it might be possible to do a 3x2 array with a total resolution of
5040x2100 running off a single video card. (1680x1050 LCDs are pretty
cheap, these days). Would be interesting to try out, but matrox says that
the 3x 1680x1050 mode strictly requires Vista or XP.

regards

Bernhard
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Old 01-05-09, 07:15 AM   #20
JaXXoN
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Default Re: 180.16 64bit Xinerama

Quote:
Originally Posted by xianthax View Post
There is a limitation for nvidia cards at a buffer size of 4096 x 4096 (i believe this is still true), for instance 4 screens @ 1980 horizontal each, obviously breaks this
This 4096 pixel limitations doesn't exist any more for 8 series cards, i.e. by the
time when i operated three displays off two 8800GT cards, then i could play UT2004
or X-Plane fullscreen at 4800x1200. This now also applies for a single card triple
head solution using a TH2G + GTX 260 (for details, please check
http://www.nvnews.net/vbulletin/show....php?p=1684225).

From what i know, 8 Series cards have a limitation of 8192 pixel - recent
Quadros don't have a limit (per docs, but i couldn't try that out).

regards

Bernhard
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Old 01-05-09, 10:54 AM   #21
xianthax
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Default Re: 180.16 64bit Xinerama

Quote:
Originally Posted by JaXXoN View Post
This doesn't sound like something that is going to happen, soon ...

I guess it would be much easier to fix XGL, instead.
won't be happening, everything that XGL did (short of multi GPU compositing) was rolled into the trunk of Xorg, its not going to get picked up and run as a separate project when Xrandr already plans to cover that functionality.

cheers,

x
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