linux-kernel - Re: Bisected regression: hang on i915 between 3.1.0-rc9 and 3.1.0

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Message-ID: <86obw3e133.fsf@sumi.keithp.com>
Date:	Tue, 22 Nov 2011 23:42:56 -0800
From:	Keith Packard <keithp@...thp.com>
To:	Meelis Roos <mroos@...ux.ee>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	dri-devel@...ts.freedesktop.org,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Daniel Vetter <daniel@...ll.ch>
Subject: Re: Bisected regression: hang on i915 between 3.1.0-rc9 and 3.1.0

On Wed, 23 Nov 2011 09:28:52 +0200 (EET), Meelis Roos <mroos@...ux.ee> wrote:

> Yes, VT-x and VT-d are both enabled from BIOS setup.

Any reason for that? We've found all kinds of problems with DMAR enabled
on these machines that is only resolved by completely turning it
off. You might try with intel_iommu=off and make sure that's stable.

-- 
keith.packard@...el.com

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