QMI errors om Telit LM960A18 after reset

[Aleksander Morgado]

Hey,

>
> I have been trying to use a Telit LM960A18 using ModemManager 1.12.6
> using libqmi 1.24.4 on a router running openwrt. I have been
> experiencing instability some time after the modem is reset.
> Sporadically after one or more resets, the modem will refuse to connect
> or reset. Resets have no effect, while attemping to bring up the wwan
> network interface for the modem results in
>
>  daemon.notice netifd: wwan (8476): error: couldn't connect the modem:
>  'GDBus.Error:org.freedesktop.libqmi.Error.Protocol.InvalidTransition:
>  Couldn't set operating mode: QMI protocol error (60):
>  'InvalidTransition''
>
> being printed in syslog. This failure persists after a warm reboot. In
> order to fully reset the modem a hard power cycle of the board is
> required.
>
> Is this something that can be worked around in libqmi or is it entirely
> the modem's fault?

I think we need to see ModemManager debug logs to try to understand
how the transition to online mode is failing. Would you be able to get
those while the issue is reproduced?

-- 
Aleksander
https://aleksander.es