linux-kernel - Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled

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Message-ID: <20090407075640.GA16516@srcf.ucam.org>
Date:	Tue, 7 Apr 2009 08:56:40 +0100
From:	Matthew Garrett <mjg@...hat.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Andrew Lutomirski <amluto@...il.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Kyle McMartin <kyle@...hat.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Mark Gross <mgross@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled

On Mon, Apr 06, 2009 at 01:56:01PM -0700, David Woodhouse wrote:

> Dirk reported the same panic, but we've just turned his iommu back on
> and completely failed to reproduce the problem -- so I'm kind of stuck.

I saw this on a T400, but only on the first boot after enabling DMAR - 
power cycling "fixed" it.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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