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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20111107142740.GA17686@srcf.ucam.org>
Date:	Mon, 7 Nov 2011 14:27:40 +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 Mon, Nov 07, 2011 at 03:25:13PM +0100, Thomas Renninger wrote:
> On Monday, November 07, 2011 02:59:24 PM Matthew Garrett wrote:
> > 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
> How do you intend to fix that?
> From description above it sounds as if this problem is not
> fixable from OS side.

Tear down VT-D state before reboot.

-- 
Matthew Garrett | mjg59@...f.ucam.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/