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: Tue, 13 Jan 2015 17:47:24 +0100 Message-ID: <1202643605.20150113174724@eikelenboom.it> References: <618666178.20150113173510@eikelenboom.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <618666178.20150113173510@eikelenboom.it> Sender: linux-kernel-owner@vger.kernel.org To: Sander Eikelenboom , "Rafael J. Wysocki" , Len Brown Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org List-Id: linux-acpi@vger.kernel.org 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