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From: Fedor Karpelevitch <fedor-ugkMPi23kyXAHCkTjeiZhQ@public.gmane.org>
To: Nate Lawson <nate-Y6VGUYTwhu0@public.gmane.org>
Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: double power button events on presario 900 - apparently a timing issue?
Date: Wed, 24 Sep 2003 16:21:11 -0700	[thread overview]
Message-ID: <200309241621.11993.fedor@karpelevitch.net> (raw)
In-Reply-To: <20030924111121.F53806-Y6VGUYTwhu0@public.gmane.org>

Nate Lawson wrote:
> On Wed, 24 Sep 2003, Fedor Karpelevitch wrote:
> > as I previously mentioned I am seeing an annoying problem on my
> > presario 900 - when power button (works as FF here) is pressed it
> > generates two events every time. I was experimentin with
> > debugging output and noticed an interesting thing - if I do
> > echo 0xffffffff > /proc/acpi/debug_level
> > to get verbose debug output the problem goes away - I only get
> > one event every time button is pressed. Looks like the problem is
> > caused by some kind timing issue which goes away when debugging
> > slows it down. Does this sound like a reasonable guess? Would
> > anyone suggest how this can be debugged further?
>
> It means you need to debounce the event.

do you mean debouncing on the receiving end? or would that be some way 
to avoid that in the kernel code?

Fedor.


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  parent reply	other threads:[~2003-09-24 23:21 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-09-24 14:23 double power button events on presario 900 - apparently a timing issue? Fedor Karpelevitch
     [not found] ` <200309240723.28526.fedor-ugkMPi23kyXAHCkTjeiZhQ@public.gmane.org>
2003-09-24 18:11   ` Nate Lawson
     [not found]     ` <20030924111121.F53806-Y6VGUYTwhu0@public.gmane.org>
2003-09-24 23:21       ` Fedor Karpelevitch [this message]
     [not found]         ` <200309241621.11993.fedor-ugkMPi23kyXAHCkTjeiZhQ@public.gmane.org>
2003-09-25 15:59           ` Fedor Karpelevitch
     [not found]             ` <200309250859.46970.fedor-ugkMPi23kyXAHCkTjeiZhQ@public.gmane.org>
2003-09-25 16:37               ` Nate Lawson

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