linux-kernel - Re: [AGPGART] intel_agp: use table for device probe

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Message-ID: <20070618023726.GA7594@zhen-devel.sh.intel.com>
Date:	Mon, 18 Jun 2007 10:37:26 +0800
From:	Wang Zhenyu <zhenyu.z.wang@...el.com>
To:	Carlo Wood <carlo@...noe.com>, Dave Airlie <airlied@...il.com>,
	Dave Jones <davej@...hat.com>, linux-kernel@...r.kernel.org,
	eric@...olt.net
Subject: Re: [AGPGART] intel_agp: use table for device probe

On 2007.06.18 03:56:36 +0000, Carlo Wood wrote:
> On Mon, Jun 18, 2007 at 10:57:38AM +1000, Dave Airlie wrote:
> > >Right now, I'm at a loss to explain the corruption, so it's
> > >difficult to suggest what to try.
> > 
> > The thing is here, this is PCIE, so if there is a GPU plugged into the
> > PCIE 16x slot in theory the main onboard graphics should disable, AGP
> > code is used to control the GART for the onboard chip, in this case a
> > plugged in card will  not use AGP, I wonder have Intel tested with a
> > pcie card in place...

Agree. We seem to always enable AGP even IGD is disabled or not exists,
other card should not depend on this module ever.

> 
> That is Chinese for me :/.
> Do you want me to try something?

Carlo, I've just built latest kernel git tree on a Dell 965G box and
have a NV card plugged-in. It boots fine.

Linux agpgart interface v0.102 (c) Dave Jones
agpgart: Detected an Intel 965G Chipset.
agpgart: AGP aperture is 256M @ 0x0

I don't know why it hangs your machine when loading this module, it should
just not bother anything. But from your last "modprobe: ..." line, it seems
there's really badness somewhere, do you have serial console to see more
in the message?
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