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SubjectRe: Dell Inspiron 5558/0VNM2T hangs at resume from suspend when USB 3 is enabled
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On 20.03.2017 17:39, Diego Viola wrote:
> On Mon, Mar 20, 2017 at 11:21 AM, Mathias Nyman
> <mathias.nyman@linux.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

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