Reloading stats failed: QMI operation failed: Transaction timed out

[ratnavel]

   - The device did stop communicating after that (including the QMI
   commands).
   - The device did not reboot and no internal reset occurred. Only manual
   modem reset had to be done to bring it out of that state.
   - It got stuck forever.
   - Firmware version - EM74xx -  *02.24.05.06*

Planning to upgrade to *02.33.03.00*
Any other pointers to confirm this is a modem firmware issue?

Thanks,
Ratnavel


On Wed, Jul 15, 2020 at 12:16 PM Aleksander Morgado <
aleksander at aleksander.es> wrote:

> Hey!
>
> >
> > 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. This also explains why you didn't get the response to the stats
> query, the device stopped sending info in the USB layer.
>
> Did the device keep the data communication after this happened? Or did
> only the QMI commands get stopped?
> Did the device at least reboot itself after some seconds? Or did it
> get stuck forever? I've seen devices doing both kind of things.
> What EM74xx firmware version are you using? If not the newest one,
> maybe try upgrading?
>
> --
> Aleksander
> https://aleksander.es
>
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