linux-kernel - Re: [git pull] drm main pull for 3.4-rc1

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Message-ID: <20120327203913.GA2436@phenom.ffwll.local>
Date:	Tue, 27 Mar 2012 22:39:13 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Tony Vroon <tony@...x.net>
Cc:	Dave Airlie <airlied@...ux.ie>,
	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	linux-kernel@...r.kernel.org, Matt Turner <mattst88@...il.com>
Subject: Re: [git pull] drm main pull for 3.4-rc1

On Tue, Mar 27, 2012 at 09:31:24PM +0200, Daniel Vetter wrote:
> On Mon, Mar 26, 2012 at 03:44:33PM +0100, Tony Vroon wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> > 
> > On 26/03/12 15:32, Daniel Vetter wrote:
> > > Also, can you check whether disabling vt-d does work around the
> > > issue?
> > 
> > Yes, that does appear to stay operational for longer on:
> > Linux adrastea 3.3.0-06972-ge22057c #1 SMP PREEMPT Mon Mar 26 11:29:21
> > BST 2012 x86_64 Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz GenuineIntel
> > GNU/Linux
> > 
> > Obviously I would like to have x2apic and my IOMMU back...
> 
> Can you try out the for-chainsaw branch from
> 
> git://people.freedesktop.org/~danvet/drm
> 
> Afaics it seems to help here on my snb with VT-d enabled. But that means
> it'll still crash eventually with tons of DMAR fault message (like yours).
> But compared to previous kernels it now doesn't insta-die for me. So no
> high hopes, please, but it would be interesting to know how this fares for
> you.
> 
> Meanwhile I'll be trying a few other funky tricks.

Yet another thing to try: Can you append intel_iommu=igfx_off to your
kernel cmdline? If you can, try this both on mainline kernels and with my
additional patches.
-Daniel
-- 
Daniel Vetter
Mail: daniel@...ll.ch
Mobile: +41 (0)79 365 57 48
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