linux-kernel - Re: i915 freakout with latest 3.7 git

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Date:	Tue, 04 Dec 2012 21:41:56 +0100
From:	Lekensteyn <lekensteyn@...il.com>
To:	dri-devel@...ts.freedesktop.org
Cc:	Heinz Diehl <htd@...tha.org>, Daniel Vetter <daniel@...ll.ch>,
	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Heinz Diehl <htd@...cy-poultry.org>
Subject: Re: i915 freakout with latest 3.7 git

On Tuesday 04 December 2012 13:35:22 Heinz Diehl wrote:
> Btw: which kernel is known to be the "last good one"?
As mentioned in the linked bug [1], I bisected it to:

commit 504c7267a1e84b157cbd7e9c1b805e1bc0c2c846
Author: Chris Wilson <chris@...is-wilson.co.uk>
Date:   Thu Aug 23 13:12:52 2012 +0100

    drm/i915: Use cpu relocations if the object is in the GTT but not mappable

> > (you need to disable rc6 on ilk to not hit another issue which seems much
> > easier to hit)
> 
> Ilk? If this stands for "Ironlake": I'm on Sandybridge.
> 
> > ...
> 
> Bisecting will be a pain without being able to reproduce
> the hang reliably.
> 
> > Atm we're trying to come up with ways to dump more debug
> > information, >but with no clue whatsoever what's going on that's
> > slow-going.
> Is there anything at the moment I can do to help you to get a grip on
> this problem? My machine is a Core i5-420M laptop with 4GB RAM (Asus
> U45-JC).
i5-420M is not SB, but ILK. i5-2xxx is SB. I have a i5-460M myself. 
i915.i915_enable_rc6=0 worked for me, if it does not work for you, then you 
probably hit another bug.

Peter


 [1]: https://bugs.freedesktop.org/show_bug.cgi?id=55984#c9
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