Reloading stats failed: QMI operation failed: Transaction timed out

[ratnavel]

Thanks on the input.
In this case it seems to be in a permanently stuck state and no
communication whatsoever.
Will check for any other symptoms leading to this state.

Thanks,
Ratnavel



On Wed, Jul 15, 2020 at 12:36 PM Bjørn Mork <bjorn at mork.no> wrote:

> Aleksander Morgado <aleksander at aleksander.es> writes:
>
> >>
> >> WARNING: CPU: 1 PID: 0 at /linux-4.10.0/net/sched/sch_generic.c:316
> dev_watchdog+0x22c/0x230
> >> NETDEV WATCHDOG: wwp0s (qmi_wwan): transmit queue 0 timed out
> >>
> >
> > Oh well, the infamous "transmit queue 0 timed out" error... That is,
> > as far as I know, a clear indication of a modem firmware problem; the
> > device stopped responding in the USB layer, so the device is probably
> > stuck.
>
> Yes, this warning is expected if the modem is stuck.
>
> But I'd like to note that the warning by itself doesn't necessarily
> imply that a permanently stuck modem.  It can be triggered under normal
> conditions for radio devices.  The warning just says that the TX queue
> had to be stopped for more than 5 seconds. This can happen e.g. due to
> temporary radio network issues. The driver doesn't know whether the
> modem is stuck for 6 seconds or forever when issuing the warning.
>
> Of course, in this case there are other indications that the modem
> firmware has locked up, and the warning is definitely a symptom of that
> lockup.
>
> Just trying to add some extra context for future google searches :-)
> Some people are worried when they see that warning from an otherwise
> working modem.  There is no reason to worry in such cases.  It is
> perfectly normal and harmless.
>
>
>
> Bjørn
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> ModemManager-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
>
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