From: Matthew Garrett <mjg59@srcf.ucam.org>
To: "Darrick J. Wong" <djwong@us.ibm.com>
Cc: Thomas Renninger <trenn@suse.de>,
linux-kernel <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>,
cpufreq@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH v2] acpi: Fix regression where _PPC is not read at boot even when ignore_ppc=0
Date: Wed, 29 Apr 2009 23:00:37 +0100 [thread overview]
Message-ID: <20090429220037.GA8604@srcf.ucam.org> (raw)
In-Reply-To: <20090429213930.GE6968@plum>
On Wed, Apr 29, 2009 at 02:39:31PM -0700, Darrick J. Wong wrote:
> I don't know about XP's copy of intelppm.sys, but this would seem to confirm
> that WS03 and WS08 check _PPC at boot time.
Ok, so that makes things interesting. From what we know about the T60
(and based on Ingo's report), _PPC may evaluate to 2 on bootup. However,
if this is ignored then later notifications are correct. This implies
that Windows either ignores the initial evaluation or does something
that triggers a notification.
The only notifications appear to be sent from event methods, so there's
nothing obvious there that we can trigger. I'm actually quite confused
by this now. Ingo, if you re-add that block, does your system stop
working again?
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-04-29 22:00 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-15 22:53 [PATCH] acpi: Fix regression where _PPC is not read at boot even when ignore_ppc=0 Darrick J. Wong
2009-04-16 0:27 ` [PATCH v2] " Darrick J. Wong
2009-04-16 10:01 ` Thomas Renninger
2009-04-16 10:32 ` Ingo Molnar
2009-04-16 17:42 ` Darrick J. Wong
2009-04-16 18:49 ` Thomas Renninger
2009-04-16 22:45 ` Matthew Garrett
2009-04-20 5:13 ` Len Brown
2009-04-20 9:13 ` Thomas Renninger
2009-04-20 10:45 ` Ingo Molnar
2009-04-29 13:19 ` Thomas Renninger
2009-04-29 13:19 ` Thomas Renninger
2009-04-29 14:48 ` Ingo Molnar
2009-04-29 21:43 ` Darrick J. Wong
2009-04-30 9:07 ` Thomas Renninger
2009-04-30 9:17 ` Ingo Molnar
2009-04-20 22:18 ` Henrique de Moraes Holschuh
2009-04-28 19:33 ` Darrick J. Wong
2009-04-28 19:53 ` Matthew Garrett
2009-04-28 20:24 ` Darrick J. Wong
2009-04-29 21:39 ` Darrick J. Wong
2009-04-29 22:00 ` Matthew Garrett [this message]
2009-04-30 7:25 ` Ingo Molnar
2009-04-30 9:54 ` Matthew Garrett
2009-04-30 11:10 ` Ingo Molnar
2009-04-30 11:13 ` Matthew Garrett
2009-05-15 19:12 ` Darrick J. Wong
2009-06-02 23:21 ` Darrick J. Wong
2009-06-07 10:05 ` Ingo Molnar
2009-07-15 0:32 ` Darrick J. Wong
2010-02-16 22:07 ` Matthew Garrett
2010-02-16 22:26 ` Darrick J. Wong
2010-02-18 9:02 ` Len Brown
2010-02-18 18:28 ` Darrick J. Wong
2010-02-19 6:12 ` Len Brown
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