From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sander Eikelenboom Subject: if power button pressed 1x it creates the same ACPI event twice Date: Tue, 13 Jan 2015 17:35:10 +0100 Message-ID: <618666178.20150113173510@eikelenboom.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: "Rafael J. Wysocki" , Len Brown Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org List-Id: linux-acpi@vger.kernel.org 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