linux-kernel - Re: [linux-pm] Linux 2.6.21-rc6

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Date:	Wed, 25 Apr 2007 21:36:57 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Tobias Diedrich <ranma+kernel@...edrich.de>
Cc:	David Brownell <david-b@...bell.net>,
	linux-pm@...ts.linux-foundation.org, pavel@...e.cz,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	linux-pm@...ts.osdl.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...sta.de>
Subject: Re: [linux-pm] Linux 2.6.21-rc6

On Wednesday, 25 April 2007 19:14, Tobias Diedrich wrote:
> Rafael J. Wysocki wrote:
> > On Sunday, 15 April 2007 21:40, Tobias Diedrich wrote:
> > > Rafael J. Wysocki wrote:
> > > > On Sunday, 15 April 2007 17:14, David Brownell wrote:
> > > > > On Sunday 15 April 2007 4:16 am, Rafael J. Wysocki wrote:
> > > > > > On Sunday, 15 April 2007 10:02, Tobias Diedrich wrote:
> > > > > > I think using the 'shutdown' mode of suspend would be better.  There's a little
> > > > > > point in using 'platform' on desktop systems anyway.
> > > > > > 
> > > > > > Frankly, I don't know what to do about it.  If we move platform_finish() after
> > > > > > device_resume(), some systems may be broken ...
> > > > > 
> > > > > What I'm curious about is exactly why the patch matters.  What ACPI
> > > > > magic is being invoked to confuse, or unconfuse, those controllers?
> > > > 
> > > > I think the patch helps, because it makes the ACPI magic be done while the
> > > > i8042's .resume() is being executed.
> > > > 
> > > > Which makes me think the following patch might help:
> > > 
> > > Unfortunately not, I tried this before disabling CONFIG_SERIO_I8042.
> > 
> > Well, this means i8042 can be ruled out, so the problem probably is related
> > to the ACPI resume which makes it _much_ more difficult to debug.
> > 
> > Can you compile the ACPI drivers: processor, thermal, fan, battery, etc. as
> > modules, boot the kernel with init=/bin/bash and see if the problem is still
> > present (please keep CONFIG_SERIO_I8042 unset just in case)?
> > 
> > Rafael
> 
> I first tried it with acpi+cpufreq completely disabled (works).
> Then I tried it with acpi enabled, but everything as modules and
> those not loaded (init=/bin/bash, hangs at second suspend).

Have you tried with ACPI and without cpufreq?

Rafael
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