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 and TUXEDO Book 1406 Date: Sat, 3 Feb 2018 12:09:44 +0100 Message-ID: <5d6a4804-d4d1-df4f-6b63-43ac6b00af96@molgen.mpg.de> References: <5a74e1a7-2083-c6b2-f51a-f44908ac8bc4@molgen.mpg.de> <20180130175017.72inurhk5l7tcvae@dtor-ws> <20180130180736.ehucqywbz7zdl4v7@dtor-ws> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: Content-Language: de-DE 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 List-Id: linux-input@vger.kernel.org Dear Dmitry, Am 30.01.2018 um 19:39 schrieb Paul Menzel: > 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], >>>> there is a >>>> regression, that i8042 AUX port [serio1] suspend takes a second on >>>> Dell XPS >>>> 13 9360 and TUXEDO Book 1406. >>> >>> It would be really helpful to know when the regression started. >> >> 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: >> >> [   94.591636] calling  serio1+ @ 2299, parent: i8042 >> [   94.794292] psmouse serio1: Failed to disable mouse on isa0060/serio1 >> [   95.593303] call serio1+ returned 0 after 974280 usecs >> >> 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 looking into this. Just to note, that it worked with Linux > 4.14.1 from Ubuntu 17.10, so it’s probably something in 4.15. Bisecting > will take a bit, as the FTRACE stuff broke in Linux 4.15-rc1 and was > only fixed in 4.15-rc9. Hopefully, it’s just one commit I need to > backport. I’ll get back to you hopefully at the end of the week. Unfortunately, I am unable to reproduce it currently. Also not with the original Linux kernel versions I tried. I’ll report back, when I see it the next time. Kind regards, Paul