SLI support for 8800 GTX?

SLI support for 8800 GTX?

[Jake Peavy]

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Hi all,

Can someone comment on SLI support in nouveau?  I'm trying to run KMS (with
Plymouth) and nouveau on dual 8800GTXs and not having much (any) luck, I
think the message I get is "GPU deadlock".

Thanks,

-- 
-jp


I bet the sparrow looks at the parrot and thinks, yes, you can talk, but
LISTEN TO YOURSELF!

deepthoughtsbyjackhandey.com

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Re: SLI support for 8800 GTX?

[Pekka Paalanen]

On Mon, 22 Jun 2009 16:15:45 -0400
Jake Peavy <djstunks-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> Hi all,
> 
> Can someone comment on SLI support in nouveau?  I'm trying to run KMS (with
> Plymouth) and nouveau on dual 8800GTXs and not having much (any) luck, I
> think the message I get is "GPU deadlock".

To get SLI support, we would need to have a developer with SLI hardware.
I do not think there is a developer even with any two cards, since the bug
https://bugs.freedesktop.org/show_bug.cgi?id=16897
is still open. Someone with interest in multicard or SLI support should
join the project and write the code.

The current status is "not implemented" and as you found out, multicard
really does not work at all. SLI is another story after multicard
support.

-- 
Pekka Paalanen
http://www.iki.fi/pq/

Re: SLI support for 8800 GTX?

[Alexey Dobriyan]

On Mon, Jun 22, 2009 at 11:35:46PM +0300, Pekka Paalanen wrote:
> On Mon, 22 Jun 2009 16:15:45 -0400
> Jake Peavy <djstunks-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> 
> > Can someone comment on SLI support in nouveau?  I'm trying to run KMS (with
> > Plymouth) and nouveau on dual 8800GTXs and not having much (any) luck, I
> > think the message I get is "GPU deadlock".
> 
> To get SLI support, we would need to have a developer with SLI hardware.
> I do not think there is a developer even with any two cards, since the bug
> https://bugs.freedesktop.org/show_bug.cgi?id=16897
> is still open. Someone with interest in multicard or SLI support should
> join the project and write the code.
> 
> The current status is "not implemented" and as you found out, multicard
> really does not work at all. SLI is another story after multicard
> support.

What can be a first first "milestone" for multicard setup?

Re: SLI support for 8800 GTX?

[Pekka Paalanen]

On Wed, 8 Jul 2009 21:43:51 +0400
Alexey Dobriyan <adobriyan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> On Mon, Jun 22, 2009 at 11:35:46PM +0300, Pekka Paalanen wrote:
> > To get SLI support, we would need to have a developer with SLI hardware.
> > I do not think there is a developer even with any two cards, since the bug
> > https://bugs.freedesktop.org/show_bug.cgi?id=16897
> > is still open. Someone with interest in multicard or SLI support should
> > join the project and write the code.
> > 
> > The current status is "not implemented" and as you found out, multicard
> > really does not work at all. SLI is another story after multicard
> > support.
> 
> What can be a first first "milestone" for multicard setup?

I got some comments on what's needed in irc:
- POSTing cards (i.e. cold boot without executing the x86 BIOS code)
- maybe not VGA arbiter, maybe yes...

< airlied> the only thing nouveau needs t oworry about vgaarb is if
           you can't disable VGA decodes
< airlied> or can't discover how to disable them
< airlied> in that case you need to provide a callback to disable IRQs or
           have a very resilient IRQ handler
< airlied> that can deal with memory/io space disappearing

< darktama_> the BIOS parser can cope with earlier cards apparently,
             I started looking at making G8x work today
< marcheu> yeah it works for resume, which is virtually the same
< marcheu> but since we have other bugs, we can't have multi-card support ATM :)

Since I'm not familiar with this topic, I leave the interpretation for you.
You can poke these guys on irc :-)

-- 
Pekka Paalanen
http://www.iki.fi/pq/