On Tue, 20 Sep 2016, Ritesh Raj Sarraf wrote:

> Hash: SHA512
> On Mon, 2016-09-19 at 13:48 -0400, Alan Stern wrote:
> > 
> > This ought to help.  Ritesh, please apply this patch on top of the 
> > two earlier ones and let's see what happens.
> > 
> > Alan Stern
> > 
> > 
> Please find the logs at the following links. On this boot, I did not see any
> kernel stack being printed.
> https://people.debian.org/~rrs/tmp/4.8.0-rc7ulf1alan2+.kern.log
> https://people.debian.org/~rrs/tmp/usb-4.8.0-rc7ulf1alan2+.log

This is a lot better.  No more I/O errors.

We still have irregular suspends and resumes, but that's to be 
expected.  More worrying are the spontaneous disconnects.  They don't 
seem to be related to the suspend/resume activity.

You can disable suspend for this device entirely by doing:

        echo on >/sys/bus/usb/devices/2-4/power/control

I'm afraid that this won't prevent the device from disconnecting
itself, though.  This appears to be some sort of hardware bug that
can't be fixed in software.

Alan Stern

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