linux-kernel - Re: [PATCH 2/2] x86: Enable monitor/mwait on Intel if BIOS hasn't already

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Date:	Wed, 03 Aug 2011 15:17:59 -0400 (EDT)
From:	Len Brown <lenb@...nel.org>
To:	Andrew Lutomirski <luto@....edu>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Fenghua Yu <fenghua.yu@...el.com>, linux-acpi@...r.kernel.org
Subject: Re: [PATCH 2/2] x86: Enable monitor/mwait on Intel if BIOS hasn't
 already

> >> What machine has this BIOS bug, and are you running
> >> the latest version of the BIOS?
> >
> > Intel DQ67SW, version SWQ6710H.86A.0051.2011.0413.1154.  This is not
> > quite up-to-date -- I'll test a newer BIOS.
> 
> SWQ6710H.86A.0053.2011.0615.1535 has the same problem.  It fixed ASPM, though :)
> 
> Should I redo the patch with a printk to warn about the firmware bug?

I would hope that a patch that _only_ prints [Firmware bug]
should be enough.  This isn't the kind of workaround
that we should really have to carry in the kernel.

This is still a very new platform, and my guess is that
they are actively updating the BIOS as we speak.
I'll see if I can figure out who to talk to
in order to make sure of that:-)

thanks,
Len Brown, Intel Open Source Technology Center