2010-07-09 15:00:46

by Woody Suwalski

[permalink] [raw]
Subject: Yet another 2.6.35 regression (AGP)? (resend)

I have found one system, where 2.6.35 does not work (as tested with rc3
and rc4)
That Intel system has no problems in 2.6.33.x nor 2.6.34.0.

The problem seems to be in AGP - I can boot if I specify "agp=off" - but
of course only in text mode...
There seems to be a hard lock-up, so the only way to show the crash is
by picture 8-)

Since I do not build kernel on that machine, I did not do any bisect
tests, however if someone is interested in digging deeper, I can try...
Preferably a patch to try out ;-)

This bug seems to be different then
https://bugzilla.kernel.org/show_bug.cgi?id=16179

Should it be blamed on BIOS (the conflict indicated just before the crash)?

Thanks, Woody

PS. Resending, as original post cc'd
[email protected], what seems to be bad...


Attachments:
agp_crash_small.jpg (90.28 kB)

2010-07-09 20:15:35

by Tim Gardner

[permalink] [raw]
Subject: Re: Yet another 2.6.35 regression (AGP)? (resend)

On 07/09/2010 09:00 AM, Woody Suwalski wrote:
> I have found one system, where 2.6.35 does not work (as tested with rc3
> and rc4)
> That Intel system has no problems in 2.6.33.x nor 2.6.34.0.
>
> The problem seems to be in AGP - I can boot if I specify "agp=off" - but
> of course only in text mode...
> There seems to be a hard lock-up, so the only way to show the crash is
> by picture 8-)
>
> Since I do not build kernel on that machine, I did not do any bisect
> tests, however if someone is interested in digging deeper, I can try...
> Preferably a patch to try out ;-)
>
> This bug seems to be different then
> https://bugzilla.kernel.org/show_bug.cgi?id=16179
>
> Should it be blamed on BIOS (the conflict indicated just before the crash)?
>
> Thanks, Woody
>
> PS. Resending, as original post cc'd
> [email protected], what seems to be bad...
>

How about this patch? I'm waiting confirmation from another user, but
your problem looks quite similar.

rtg
--
Tim Gardner [email protected]


Attachments:
0001-UBUNTU-Upstream-i915-Use-the-correct-mask-to-detect-.patch (2.04 kB)