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

[Mathias Nyman]

On 20.03.2017 17:39, Diego Viola wrote:
> On Mon, Mar 20, 2017 at 11:21 AM, Mathias Nyman
> <mathias.nyman@xxxxxxxxxxxxxxx> 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