ModemManager Process is shutting down

[ratnavel]

Thanks Aleksander. Will update and try on it

On Fri, Oct 16, 2020 at 9:20 PM Aleksander Morgado <aleksander at aleksander.es>
wrote:

> Hey,
>
> > Before Logs:
> >
> > ModemManager[104]: <debug> Signal strength (umts): -79 dBm
> > ModemManager[104]: <debug> Signal strength: -79 dBm --> 55%
> > ModemManager[104]: <debug> Modem /org/freedesktop/ModemManager1/Modem/1:
> access technology changed (unknown -> umts)
> > ModemManager[104]: <debug> Modem /org/freedesktop/ModemManager1/Modem/1:
> signal quality updated (55)
> > ModemManager[104]: <debug> Periodic signal quality checks scheduled in
> 30s
> > ModemManager[104]: <debug> Running registration checks (CS: 'yes', PS:
> 'yes', EPS: 'yes')
> > ModemManager[104]: [/dev/cdc-wdm0] sent message...#012<<<<<<
> RAW:#012<<<<<<   length = 13#012<<<<<<   data   =
> 01:0C:00:00:03:03:00:1B:00:24:00:00:00
> >  ModemManager[104]: [/dev/cdc-wdm0] sent generic request
> (translated)...#012<<<<<< QMUX:#012<<<<<<   length  = 12#012<<<<<<   flags
>  = 0x00#012<<<<<<   service = "nas"#012<<<<<<   client  = 3#012<<<<<<
> QMI:#012<<<<<<   flags       = "none"#012<<<<<<   transaction =
> 27#012<<<<<<   tlv_length  = 0#012<<<<<<   message     = "Get Serving
> System" (0x0024)
> > ModemManager[104]: <debug> building consolidated registration state: cs
> 'idle', ps 'unknown', eps 'unknown' --> 'idle'
> > ModemManager[104]: <info>  Modem /org/freedesktop/ModemManager1/Modem/0:
> 3GPP Registration state changed (unknown -> idle)
> > ModemManager[104]: <debug> building consolidated registration state: cs
> 'idle', ps 'idle', eps 'unknown' --> 'idle'
> > ModemManager[104]: <debug> building consolidated registration state: cs
> 'idle', ps 'idle', eps 'idle' --> 'idle'
> >
> > dbus[1073]: [system] Rejected send message, 2 matched rules;
> type="method_return", sender=":1.140" (uid=0 pid=104
> comm="/usr/sbin/ModemManager  ") interface="(unset)" member="(unset)" error
> name="(unset)" requested_reply="0" destination=":1.142" (uid=0 pid=240
> comm="/usr/bin/ApplnManagerd  ")
> >
> > After this :
> > No logs but  the ModemManager restarts, in fact there is a crash and the
> core is dumped.
> > The ModemManager does restart after that and recovers.
> >
>
> Ok, so my assumption was right I think. This is just the daemon
> crashing and restarted afterwards by systemd, and in between some MM
> client (likely NetworkManager) asked DBus to initiate it, but DBus
> activation isn't enabled for MM.
>
> > Also this happens after the ModemReset in all cases.
> >
>
> I would suggest to upgrade your ModemManager. 1.10.8 is not even the
> latest release in the 1.10.x series.
> This PPA has a much newer MM version for Ubuntu 16.04:
> https://launchpad.net/~aleksander-m/+archive/ubuntu/modemmanager-xenial
>
> --
> Aleksander
> https://aleksander.es
>
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