From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sander Eikelenboom Subject: Re: if power button pressed 1x it creates the same ACPI event twice Date: Mon, 19 Jan 2015 14:09:34 +0100 Message-ID: <577867575.20150119140934@eikelenboom.it> References: <618666178.20150113173510@eikelenboom.it> <1202643605.20150113174724@eikelenboom.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from vserver.eikelenboom.it ([84.200.39.61]:43989 "EHLO smtp.eikelenboom.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751437AbbASNJj (ORCPT ); Mon, 19 Jan 2015 08:09:39 -0500 In-Reply-To: <1202643605.20150113174724@eikelenboom.it> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Sander Eikelenboom , "Rafael J. Wysocki" , Len Brown Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Hello Sander, Tuesday, January 13, 2015, 5:47:24 PM, you wrote: > Tuesday, January 13, 2015, 5:35:10 PM, you wrote: >> Hi Rafael / Len, >> When i press the power-button on my intel NUC, i get twp ACPI power-events shortly >> after one another (within a second), instead of just one. >> It doesn't matter if i have the old /proc/acpi interface enabled or disabled in the kernel config. >> I have tested a few older kernels lingering around on the box and 3.14 already >> has this problem. 3.2 (from the debian repo) doesn't have the problem, it only >> fires one event. >> I did find another report: >> Re: lenovo ultrabay docking station: if power button pressed 1x it creates 2x the same ACPI event >> http://www.spinics.net/lists/linux-acpi/msg54723.html >> But that hasn't come to a conclusion ... >> Unfortunately 3.2 - 3.19-rc4 is a bit of a largish bisect window, so that's >> unfeasible :-) >> I compiled in apci debug support and tried: >> echo "0x00080000" > /sys/module/acpi/parameters/debug_layer >> echo "0xffffffff" > /sys/module/acpi/parameters/debug_level >> But i don't get any extra output in dmesg ? >> Do you have any ideas for a debug patch or better values to figure out what is going on ? >> -- >> Sander > Hmm is it normal that it registers in this way (twice) ? > [ 5.817980] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0 > [ 5.837907] ACPI: Power Button [PWRB] > [ 5.847540] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input1 > [ 5.866915] ACPI: Power Button [PWRF] > -- > Sander Hi Rafael / Len, Got some more time to test: - It's indeed giving one event for both registered power buttons (which in reality are just one hardware button) printing acpid's "%e" revealed that: 1421672289-161192235 | button/power PBTN 00000080 00000000 1421672289-279647745 | button/power LNXPWRBN:00 00000080 00000004 So i tested on another box (amd instead of intel), and that also registers 2 power buttons: # dmesg | grep -i button [ 13.435060] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0 [ 13.435294] ACPI: Power Button [PWRB] [ 13.435495] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input1 [ 13.435683] ACPI: Power Button [PWRF] So the question is .. should both register and should scripts adjust to pick up just one of them ? Or can, as a more general solution, just one be ignored when registering ? -- Sander