linux-kernel - Re: Dell Inspiron 5558/0VNM2T hangs at resume from suspend when USB 3 is enabled

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Date:   Mon, 20 Mar 2017 18:32:09 +0200
From:   Mathias Nyman <mathias.nyman@...ux.intel.com>
To:     Diego Viola <diego.viola@...il.com>
Cc:     mathias.nyman@...el.com, Roger <rogerable@...ltek.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        Wei WANG <wei_wang@...lsil.com.cn>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux USB List <linux-usb@...r.kernel.org>,
        Alan Stern <stern@...land.harvard.edu>
Subject: Re: Dell Inspiron 5558/0VNM2T hangs at resume from suspend when USB 3
 is enabled

On 20.03.2017 17:39, Diego Viola wrote:
> On Mon, Mar 20, 2017 at 11:21 AM, Mathias Nyman
> <mathias.nyman@...ux.intel.com> 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.
And if you can then one of a succesful suspend/resume for reference.

(I haven't yet checked the one you added to bugzilla)

-Mathias