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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070618000643.GA1375@alinoe.com>
Date:	Mon, 18 Jun 2007 02:06:43 +0200
From:	Carlo Wood <carlo@...noe.com>
To:	Dave Jones <davej@...hat.com>, linux-kernel@...r.kernel.org,
	eric@...olt.net, zhenyu.z.wang@...el.com
Subject: Re: [AGPGART] intel_agp: use table for device probe

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@...noe.com>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/