2002-09-12 01:51:18

by Allan Duncan

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Subject: Linux 2.4.20-pre4 & ff. blows away Xwindows with Matrox G400 and agpgart

This is a reissue of an earlier report, and I've since done some more digging.

Up to kernel 2.4.20-pre2 there was no problem, agpgart et al ran fine etc,
but from 2.4.20-pre4 onwards when Xwindows starts to load these modules
I am instantly thrown back to a booting machine.
The same kernels on a VIA MVP3 chipset box with a Matrox G200 are fine.

I have ascertained that any attempt to use agpgart triggers it.

Rather than clutter up the list with lots of log files, I've made a web page at
http://www.users.bigpond.com/allan.d/bug/Matrox.html
with all the info I could gather.

Any suggestions of how to improve the error messages around the failure point
are welcome. Nothing is written into dmesg at the time of failure.


2002-09-12 02:54:40

by Nuitari

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Subject: Re: Linux 2.4.20-pre4 & ff. blows away Xwindows with Matrox G400 and agpgart

On Thu, 12 Sep 2002, Allan Duncan wrote:

> This is a reissue of an earlier report, and I've since done some more digging.
>
> Up to kernel 2.4.20-pre2 there was no problem, agpgart et al ran fine etc,
> but from 2.4.20-pre4 onwards when Xwindows starts to load these modules
> I am instantly thrown back to a booting machine.
> The same kernels on a VIA MVP3 chipset box with a Matrox G200 are fine.
>
> I have ascertained that any attempt to use agpgart triggers it.
>
> Rather than clutter up the list with lots of log files, I've made a web page at
> http://www.users.bigpond.com/allan.d/bug/Matrox.html
> with all the info I could gather.
>
> Any suggestions of how to improve the error messages around the failure point
> are welcome. Nothing is written into dmesg at the time of failure.
> -
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>


Might be good to check with a previous bug report I posted if there are
any similarities. My problem is that the kernel panics when opengl is used
when I have some highmem available.


2002-09-12 07:46:23

by Simon Fowler

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Subject: Re: Linux 2.4.20-pre4 & ff. blows away Xwindows with Matrox G400 and agpgart

On Thu, Sep 12, 2002 at 11:56:20AM +1000, Allan Duncan wrote:
> This is a reissue of an earlier report, and I've since done some more digging.
>
> Up to kernel 2.4.20-pre2 there was no problem, agpgart et al ran fine etc,
> but from 2.4.20-pre4 onwards when Xwindows starts to load these modules
> I am instantly thrown back to a booting machine.
> The same kernels on a VIA MVP3 chipset box with a Matrox G200 are fine.
>
> I have ascertained that any attempt to use agpgart triggers it.
>
I've seen the same thing with 2.4.20-pre5-ac1, and I'm just building
pre5-aa2 to see if there's any difference. This is with an AMD 751
system (an Asus K7M), an original Radeon, and the DRI CVS code. I
couldn't get any log messages out of it, though.

Simon

--
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(crappy) Homepage: http://bg77.anu.edu.au
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2002-09-12 09:45:30

by Andi Kleen

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Subject: Re: Linux 2.4.20-pre4 & ff. blows away Xwindows with Matrox G400 and agpgart

Allan Duncan <[email protected]> writes:
>
> Any suggestions of how to improve the error messages around the failure point
> are welcome. Nothing is written into dmesg at the time of failure.

You're booting with mem=nopentium right ? It should go away when you turn
that off. I'm working on a fix. You can safely turn it off for now, the
old problems that it worked around are fixed.

-Andi

2002-09-12 21:27:16

by Simon Fowler

[permalink] [raw]
Subject: Re: Linux 2.4.20-pre4 & ff. blows away Xwindows with Matrox G400 and agpgart

On Thu, Sep 12, 2002 at 11:50:19AM +0200, Andi Kleen wrote:
> Allan Duncan <[email protected]> writes:
> >
> > Any suggestions of how to improve the error messages around the failure point
> > are welcome. Nothing is written into dmesg at the time of failure.
>
> You're booting with mem=nopentium right ? It should go away when you turn
> that off. I'm working on a fix. You can safely turn it off for now, the
> old problems that it worked around are fixed.
>
The problem goes away without mem=nopentium - I've just booted into
2.4.20-pre5aa2 and fired up X.

Simon

--
PGP public key Id 0x144A991C, or ftp://bg77.anu.edu.au/pub/himi/himi.asc
(crappy) Homepage: http://bg77.anu.edu.au
doe #237 (see http://www.lemuria.org/DeCSS)
My DeCSS mirror: ftp://bg77.anu.edu.au/pub/mirrors/css/


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