Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933094AbdCUWwn (ORCPT ); Tue, 21 Mar 2017 18:52:43 -0400 Received: from mail-vk0-f46.google.com ([209.85.213.46]:36239 "EHLO mail-vk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932470AbdCUWwl (ORCPT ); Tue, 21 Mar 2017 18:52:41 -0400 MIME-Version: 1.0 In-Reply-To: References: <58CFE56C.8050906@linux.intel.com> <58D00409.7060205@linux.intel.com> From: Diego Viola Date: Tue, 21 Mar 2017 19:52:33 -0300 Message-ID: Subject: Re: Dell Inspiron 5558/0VNM2T hangs at resume from suspend when USB 3 is enabled To: Mathias Nyman Cc: mathias.nyman@intel.com, Roger , Ulf Hansson , Greg KH , Wei WANG , "linux-kernel@vger.kernel.org" , Linux USB List , Alan Stern Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2834 Lines: 90 On Tue, Mar 21, 2017 at 12:29 PM, Diego Viola wrote: > On Tue, Mar 21, 2017 at 10:04 AM, Diego Viola wrote: >> On Mon, Mar 20, 2017 at 8:15 PM, Diego Viola wrote: >>> On Mon, Mar 20, 2017 at 3:27 PM, Diego Viola wrote: >>>> On Mon, Mar 20, 2017 at 1:32 PM, Mathias Nyman >>>> wrote: >>>>> On 20.03.2017 17:39, Diego Viola wrote: >>>>>> >>>>>> On Mon, Mar 20, 2017 at 11:21 AM, Mathias Nyman >>>>>> wrote: >>>>>>> >>>>>>> On 19.03.2017 23:29, Diego Viola wrote: >>>>>>>> >>>>>>>> >>>>> >>>>>>>>> Still a problem with 4.11.0-rc2-ARCH+ >>>>>>> >>>>>>> 4.11-rc2 has better xhci tracing, it shows each URB enqueue and dequeue >>>>>>> and >>>>>>> giveback. >>>>>>> >>>>>>> Could you try enabling xhci tracing before suspending (not the same as >>>>>>> xhci >>>>>>> verbose dynamic debug) >>>>>>> It will generate a lot of data, so better to remove all extra USB >>>>>>> devices. >>>>>>> >>>>>>> xhci tracing can be added with: >>>>>>> >>>>>>> mount -t debugfs none /sys/kernel/debug >>>>>>> echo xhci-hcd >> /sys/kernel/debug/tracing/set_event >>>>>>> >>>>>>> and then send the output of cat /sys/kernel/debug/tracing/trace >>>>>> >>>>>> >>>>>> https://bugzilla.kernel.org/attachment.cgi?id=255367 >>>>>> >>>>>> This is with Linux 4.11.0-rc3-ARCH. >>>>>> >>>>>> USB mouse/keyboard was unplugged before booting the machine. >>>>>> >>>>>> I didn't do a suspend/resume before getting this trace, should I do that? >>>>>> >>>>>> Should I reproduce the hang and get a netconsole dmesg capture with >>>>>> tracing enabled? >>>>> >>>>> >>>>> A trace and a dmesg of the same suspend/reusume hang would be great. >>>> >>>> I can capture the dmesg with netconsole once the machine hangs, but >>>> I'm not sure how I could capture /sys/kernel/debug/tracing/trace after >>>> the hang. I'm unable to use ssh after the hang. >>>> >>>>> And if you can then one of a succesful suspend/resume for reference. >>>> >>>> Here's the trace after a successful suspend/resume: >>>> >>>> https://bugzilla.kernel.org/attachment.cgi?id=255369 >>>> >>>>> >>>>> (I haven't yet checked the one you added to bugzilla) >>>>> >>>>> -Mathias >>>> >>>> Diego >>> >>> ftrace_dump_on_oops is what I was looking for. >>> >>> Diego >> >> I tried ftrace_dump_on_oops but I can't see the trace coming in, not >> sure what I'm doing wrong. :( >> >> Diego > > I was able to obtain the trace with this: hung_task_panic=1 > no_console_suspend=1 ftrace_dump_on_oops > > Diego Here's the log I was able to obtain today, dmesg + ftrace at the time of the crash: https://bugzilla.kernel.org/attachment.cgi?id=255419 USB keyboard and mouse was plugged when I reproduced this. Please let me know if you need more info. Diego