From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Menzel Subject: Re: i8042 AUX port [serio1] suspend takes a second on Dell XPS 13 9360 Date: Wed, 14 Feb 2018 17:41:29 +0100 Message-ID: References: <5a74e1a7-2083-c6b2-f51a-f44908ac8bc4@molgen.mpg.de> <20180130175017.72inurhk5l7tcvae@dtor-ws> <20180130180736.ehucqywbz7zdl4v7@dtor-ws> Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms090106010501060506050603" Return-path: In-Reply-To: <20180130180736.ehucqywbz7zdl4v7@dtor-ws> Sender: linux-kernel-owner@vger.kernel.org To: Dmitry Torokhov Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, it+linux-input@molgen.mpg.de, Mario Limonciello , Thorsten Leemhuis List-Id: linux-input@vger.kernel.org This is a cryptographically signed message in MIME format. --------------ms090106010501060506050603 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable Dear Dmitry, On 01/30/18 19:07, Dmitry Torokhov wrote: > On Tue, Jan 30, 2018 at 09:52:45AM -0800, Dmitry Torokhov wrote: >> On Tue, Jan 30, 2018 at 06:36:34PM +0100, Paul Menzel wrote: >>> I do not know, when it started, but with Linux 4.14-rc8 and 4.15, >>> benchmarking suspend and resume time with `sleepgraph.py` [1][2], the= re is a >>> regression, that i8042 AUX port [serio1] suspend takes a second on De= ll XPS >>> 13 9360 and TUXEDO Book 1406. >> >> It would be really helpful to know when the regression started. >=20 > So the reason it takes longer is because the touchpad does not want to > talk to us for some reason and we wait until commands time out: >=20 > [ 94.591636] calling serio1+ @ 2299, parent: i8042 > [ 94.794292] psmouse serio1: Failed to disable mouse on isa0060/serio= 1 > [ 95.593303] call serio1+ returned 0 after 974280 usecs >=20 > but it is not clear why it happens, I do not think we changed anything > in that path for a while, so it might be some other change affecting > things indirectly. I'm afraid you'll have to narrow the scope, and > ideally bisect. Thank you for your replies. First of all, it looks like *only* the Dell=20 system is effected as I was unable to reproduce it on the TUXEDO Book=20 1406. I have to verify that by finding old log files. Starting the bisect between 4.14 and 4.15-rc1 it turns out, that the=20 problem is also reproducible with 4.14, and I remembered wrong. Looking=20 more into it, I could also reproduce it with Linux 4.13.0-32-generic=20 from Ubuntu 16.04 (Hardware Enablement Stack). But my old logs do not=20 show the problem. As the UEFI firmware was updated to version 2.5.0 in=20 the meantime, it could also be related to that. So it turns out, with 4.16-rc1 I see this delay/failure message only=20 during the first suspend. Suspending a second time, I do not see the=20 message. Any hints how to debug this further are much appreciated. Could it be=20 related to the embedded controller? 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