linux-kernel - Re: [PATCH] x86 / reboot: Blacklist Dell OptiPlex 990 known to require PCI reboot

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Message-ID: <20120116004110.GA21240@srcf.ucam.org>
Date:	Mon, 16 Jan 2012 00:41:10 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	bastien ROUCARIES <roucaries.bastien@...il.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org
Subject: Re: [PATCH] x86 / reboot: Blacklist Dell OptiPlex 990 known to
 require PCI reboot

On Mon, Jan 09, 2012 at 05:00:08PM +0100, bastien ROUCARIES wrote:
> Le Wednesday 16 November 2011 00:19:51, Rafael J. Wysocki a écrit :
> > From: Rafael J. Wysocki <rjw@...k.pl>
> > 
> > Dell OptiPlex 990 is known to require PCI reboot, so add it to the reboot
> > blacklist in pci_reboot_dmi_table[].
> 
> 
> Sorry to hi jack this thread but it seems that dell made the same crap with my precision T1600. See 
> http://www.centos.org/modules/newbb/print.php?form=1&topic_id=32948&forum=55&order=ASC&start=0
> or
> https://bugzilla.redhat.com/show_bug.cgi?id=698239

Does it work if you disable VT-d in the firmware? If so, then adding it 
to the reboot method blacklist is the wrong fix - we need to figure out 
why VT-d interferes with Dell's reboot code.

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