linux-kernel - Re: [PATCH] X86: Solve Dell Latitudes do not reboot on x86

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Message-ID: <20111107135923.GA17060@srcf.ucam.org>
Date:	Mon, 7 Nov 2011 13:59:24 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Thomas Renninger <trenn@...e.de>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org,
	linux-acpi@...r.kernel.org, stable@...nel.org
Subject: Re: [PATCH] X86: Solve Dell Latitudes do not reboot on x86_64 more
 generally

On Sat, Nov 05, 2011 at 01:44:03AM +0100, Thomas Renninger wrote:
> There are quite some reports that those do not reboot:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/833705
> ->E6520, E6220
> http://www.linux-club.de/viewtopic.php?f=29&t=114459&start=20
> ->E5520
> and some more already are blacklisted

It's a bug in the SMM code on these machines, and it goes away if you 
disable VT-D. Let's try to actually fix it rather than adding to the 
blacklist, otherwise we'll just end up with another batch of broken 
Dells later on.

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