qmi_wwan 1-1.3:1.8: nonzero urb status received: -71 (-71 == EPROTO)

[Gopakumar Choorakkot Edakkunni]

Thanks for the reply Bjorn and Mark. Looks like the AC314U ttyUSB[0-2] none
of them responds to AT commands. So I cant say what AT+CSQ would have said
at that point .. The modems display says "disconnected" .. I will try to
see if I can reset the USB bus and recover from that in a "automated"
fashion.

Rgds,
Gopa.

On Tue, Oct 28, 2014 at 1:20 AM, Markus Gothe <nietzsche at lysator.liu.se>
wrote:

> Did you check what your CSQ (AT+CSQ) is when receiving the error?
>
> //M
>
> Skickat ifrån min mobil.
> Den 28 okt 2014 06:17 skrev Gopakumar Choorakkot Edakkunni <
> gopakumar.c.e at gmail.com>:
> >
> > Hi QMI experts,
> >
> > I have an AC 340U modem for which I periodically monitor the signal
> strength using the qmicli below. At times when my signal strength drop
> badly down to zero, I see that qmicli spits out the below errors
> continuosly. I did a google and saw some discussions around the EPIPE
> error, but none around EPROTO. Any thoughts/comments/suggestions would be
> very helpful !
> >
> > qmicli -d </dev/...> --nas-get-signal-info
> >
> > <logs>
> > qmi_wwan 1-1.3:1.8: nonzero urb status received: -71 (-71 == EPROTO)
> > qmi_wwan 1-1.3:1.8: wdm_int_callback - 0 bytes
> > qmi_wwan 1-1.3:1.8: nonzero urb status received: -71
> > qmi_wwan 1-1.3:1.8: wdm_int_callback - 0 bytes
> >
> > Rgds,
> > Gopa.
> >
> >
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/libqmi-devel/attachments/20141102/be3cfaa3/attachment.html>