linux-kernel - Re: Kernel panic with intel

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Message-ID: <CAPM=9tzwYHgbmKUuPsrW_4nrKOQ5m+7N0JV-kMpOv43yVh-49A@mail.gmail.com>
Date:	Fri, 12 Aug 2011 23:51:47 +1000
From:	Dave Airlie <airlied@...il.com>
To:	"Udo A. Steinberg" <udo@...ervisor.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	iommu@...ts.linux-foundation.org,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: Kernel panic with intel_iommu=on

On Fri, Aug 12, 2011 at 10:58 PM, Udo A. Steinberg <udo@...ervisor.org> wrote:
> Hello,
>
> After upgrading from firefox 5.0.1 to 6.0b5, my machine locks up hard, the
> moment firefox is started under Linux 3.0 with Intel IOMMU enabled.
>
> With intel_iommu=off, everything works fine. Likewise, when going back to
> firefox 5.0.1, everything works fine. I've managed to capture the following
> kernel output via the serial console.

Does intel_iommu=igfx_off work as well?

I've been seeing a few of these with Ironlake chipsets, the reason
firefox does it is probably because it causes the 3D driver to be
used.

Dave.
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