Re: [AGPGART] intel_agp: use table for device probe

[Carlo Wood]

On Sun, Jun 17, 2007 at 06:49:18PM -0400, Dave Jones wrote:
> ok, then you must have CONFIG_AGP=y

I do - not voluntary however. For some mysterious reason I am
unable to set it to n or m. I am also not able to set CONFIG_AGP_INTEL
to n, only to y or m.
(using make 'menuconfig' for example).

>  > $ find /lib/modules -name 'agpgart.ko'
>  > $ /lib/modules/2.6.22-rc5-master-188e1f81ba31af1b65a2f3611df4c670b092bbac-amd64 -name '*agp*.ko'
>  > /lib/modules/2.6.22-rc5-master-188e1f81ba31af1b65a2f3611df4c670b092bbac-amd64/kernel/drivers/char/agp/sis-agp.ko
>  > /lib/modules/2.6.22-rc5-master-188e1f81ba31af1b65a2f3611df4c670b092bbac-amd64/kernel/drivers/char/agp/intel-agp.ko
>  > /lib/modules/2.6.22-rc5-master-188e1f81ba31af1b65a2f3611df4c670b092bbac-amd64/kernel/drivers/char/agp/via-agp.ko
>  > 
>  > 2)
>  > 
>  > $ strings /lib/modules/2.6.22-rc5-master-188e1f81ba31af1b65a2f3611df4c670b092bbac-amd64/kernel/drivers/char/agp/intel-agp.ko | grep 'agpgart: Detected an Intel'
>  > <6>agpgart: Detected an Intel %s Chipset.
>  > 
>  > Hence, in the case that the kernel works, intel-agp is loaded
>  > WITHOUT printing this Detected line
> 
> That doesn't make much sense.  The hardware doesn't change between
> a working & not-working kernel, and somehow the PCI probing fails.
> Hmm, do you have CONFIG_EDAC set ?

CONFIG_EDAC=m

$ lsmod | grep edac
$

> There's an outstanding bug (well, lack of feature) , where it claims
> the PCI device before AGP gets a chance to.
> This is unrelated to your hang however, but would at least explain
> the inconsistent probing.
> 
>  > Perhaps my "solution" is to remove this module completely?
>  > I don't seem to need it.
> 
> It's needed only for 3d,

Nope - I just played UT2004 without problems, and without intel-agp loaded.

> but it'd be good to figure out why its so
> broken on your system, even if you don't need it.

Please tell me what to do / try.
I'm an experienced coder - but I never really played with the
kernel before - so you'll have to spell out how to turn on debugging etc.

-- 
Carlo Wood <carlo@xxxxxxxxxx>
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