Messages in this thread | | | Subject | Re: i8042 AUX port [serio1] suspend takes a second on Dell XPS 13 9360 and TUXEDO Book 1406 | From | Paul Menzel <> | Date | Tue, 30 Jan 2018 19:39:32 +0100 |
| |
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], 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.
Kind regards,
Paul
[unhandled content-type:application/pkcs7-signature] | |