From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: acpi-devel@lists.sourceforge.net, romano@dea.icai.upco.es
Subject: Re: [ACPI] Re: 2.6.12-rc1-mm4 and suspend2ram (and synaptics)
Date: Tue, 5 Apr 2005 17:31:52 +0200
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Cc: Pavel Machek <pavel@ucw.cz>, Stefan Schweizer <sschweizer@gmail.com>,
       Norbert Preining <preining@logic.at>, Andrew Morton <akpm@osdl.org>,
       linux-kernel@vger.kernel.org
References: <20050331220822.GA22418@gamma.logic.tuwien.ac.at> <20050402085935.GC1330@openzaurus.ucw.cz> <20050405150105.GA26149@pern.dea.icai.upco.es>
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Hi,

On Tuesday, 5 of April 2005 17:01, Romano Giannetti wrote:
> > 
> > Same way to debug it, then.... try minimal drivers.
> 
> Yes, the lifer of a kernel debugger is hard... 
> 
> Pavel, one question (maybe stupid, I am not at all an expert). Wouldn't be
> possible to add a printk when invoking and returning from suspend/resume
> methods of drivers, telling if they are specific or generic on? Maybe with
> the help of the serial console could be an aid to detect wich drivers are
> failing in that case.

The serial sonsole itself is disabled during suspend/resume, so you have to
hack the serial driver's suspend/resume routines to get any output on it
at that time. :-)

Anyway, if you want to put some debug printks somewhere, IMO a good place
to start is in resume_device() in drivers/base/power/resume.c or
in suspend_device() in drivers/base/power/suspend.c (actually, there already
is one, you only need to enable it).

Greets,
Rafael


-- 
- Would you tell me, please, which way I ought to go from here?
- That depends a good deal on where you want to get to.
		-- Lewis Carroll "Alice's Adventures in Wonderland"
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