Unable to get IPv4 over LTE

[Vincent Bernat]

 ❦ 20 janvier 2016 09:58 +0100, Bjørn Mork <bjorn at mork.no> :

> A firmware update will probably help on stability, but I don't think
> they've ever fixed the "wrong APN" bug I refer to above.  Not that I've
> bothered reporting it either.  Sierra doesn't want to support this modem
> directly (which I can understand) and refer to Lenovo for support. And I
> don't know where to start there.. Besides, I suspect this is really an
> Intel bug.  Maybe someone here with an XMM7160 modem from another vendor
> can confirm?

After many difficulties, I was able to update the firmware to the most
available version (from 1.1 something to 1.2 WW 01.1529.05). The situation
is better on some aspects (the modem doesn't crash on resume anymore),
however, I am not able to register on the home network and I don't know
why:

ModemManager[4496]: <info>  [1453638944.349427] [mm-iface-modem-3gpp.c:1164] update_registration_state(): Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state changed (denied -> registering)
ModemManager[4496]: <debug> [1453638944.349492] [mm-iface-modem.c:894] mm_iface_modem_update_access_technologies(): Modem /org/freedesktop/ModemManager1/Modem/0: access technology changed (unknown -> hsdpa, hsupa)
ModemManager[4496]: <debug> [1453638944.349557] [mm-iface-modem-location.c:295] notify_3gpp_location_update(): Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP location updated (MCC: '228', MNC: '2', Location area code: '0', Cell ID: '0')
ModemManager[4496]: <info>  [1453638944.349870] [mm-iface-modem-3gpp.c:1089] update_registration_reload_current_registration_info_ready(): Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state changed (registering -> home)
ModemManager[4496]: <info>  [1453638944.349922] [mm-iface-modem.c:1392] __iface_modem_update_state_internal(): Modem /org/freedesktop/ModemManager1/Modem/0: state changed (enabled -> registered)
ModemManager[4496]: <debug> [1453638944.350094] [mm-iface-modem.c:1036] periodic_access_technologies_check_enable(): Periodic access technology checks enabled
ModemManager[4496]: [/dev/cdc-wdm0] Received message...
>>>>>> RAW:
>>>>>>   length = 64
>>>>>>   data   = 07:00:00:80:40:00:00:00:00:00:00:00:01:00:00:00:00:00:00:00:A2:89:CC:33:BC:BB:8B:4F:B6:B0:13:3E:C2:AA:E6:DF:0B:00:00:00:14:00:00:00:05:00:00:00:04:00:00:00:3C:00:00:00:02:00:00:00:FF:FF:00:00
ModemManager[4496]: [/dev/cdc-wdm0] Received message (translated)...
>>>>>> Header:
>>>>>>   length      = 64
>>>>>>   type        = indicate-status (0x80000007)
>>>>>>   transaction = 0
>>>>>> Fragment header:
>>>>>>   total   = 1
>>>>>>   current = 0
>>>>>> Contents:
>>>>>>   service = 'basic-connect' (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df)
>>>>>>   cid     = 'signal-state' (0x0000000b)
ModemManager[4496]: <debug> [1453638948.324185] [mm-broadband-modem-mbim.c:1934] device_notification_cb(): Received notification (service 'basic-connect', command 'signal-state')
ModemManager[4496]: <debug> [1453638948.324209] [mm-broadband-modem-mbim.c:1547] basic_connect_notification_signal_state(): Signal state indication: 5 --> 16%
ModemManager[4496]: <debug> [1453638948.324321] [mm-iface-modem.c:1165] update_signal_quality(): Modem /org/freedesktop/ModemManager1/Modem/0: signal quality updated (16)
ModemManager[4496]: [/dev/cdc-wdm0] Received message...
>>>>>> RAW:
>>>>>>   length = 72
>>>>>>   data   = 07:00:00:80:48:00:00:00:00:00:00:00:01:00:00:00:00:00:00:00:A2:89:CC:33:BC:BB:8B:4F:B6:B0:13:3E:C2:AA:E6:DF:0A:00:00:00:1C:00:00:00:00:00:00:00:02:00:00:00:04:00:00:00:00:DC:05:00:00:00:00:00:00:DC:05:00:00:00:00:00
ModemManager[4496]: [/dev/cdc-wdm0] Received message (translated)...
>>>>>> Header:
>>>>>>   length      = 72
>>>>>>   type        = indicate-status (0x80000007)
>>>>>>   transaction = 0
>>>>>> Fragment header:
>>>>>>   total   = 1
>>>>>>   current = 0
>>>>>> Contents:
>>>>>>   service = 'basic-connect' (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df)
>>>>>>   cid     = 'packet-service' (0x0000000a)
ModemManager[4496]: <debug> [1453638948.425132] [mm-broadband-modem-mbim.c:1934] device_notification_cb(): Received notification (service 'basic-connect', command 'packet-service')
ModemManager[4496]: <debug> [1453638948.425157] [mm-broadband-modem-mbim.c:1749] basic_connect_notification_packet_service(): Packet service state: 'attached', data class: 'umts'
ModemManager[4496]: <debug> [1453638948.425247] [mm-iface-modem.c:894] mm_iface_modem_update_access_technologies(): Modem /org/freedesktop/ModemManager1/Modem/0: access technology changed (hsdpa, hsupa -> umts)
ModemManager[4496]: [/dev/cdc-wdm0] Received message...
>>>>>> RAW:
>>>>>>   length = 72
>>>>>>   data   = 07:00:00:80:48:00:00:00:00:00:00:00:01:00:00:00:00:00:00:00:A2:89:CC:33:BC:BB:8B:4F:B6:B0:13:3E:C2:AA:E6:DF:0A:00:00:00:1C:00:00:00:00:00:00:00:01:00:00:00:00:00:00:00:80:F0:FA:02:00:00:00:00:00:E1:F5:05:00:00:00:00
ModemManager[4496]: [/dev/cdc-wdm0] Received message (translated)...
>>>>>> Header:
>>>>>>   length      = 72
>>>>>>   type        = indicate-status (0x80000007)
>>>>>>   transaction = 0
>>>>>> Fragment header:
>>>>>>   total   = 1
>>>>>>   current = 0
>>>>>> Contents:
>>>>>>   service = 'basic-connect' (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df)
>>>>>>   cid     = 'packet-service' (0x0000000a)
ModemManager[4496]: <debug> [1453638948.933104] [mm-broadband-modem-mbim.c:1934] device_notification_cb(): Received notification (service 'basic-connect', command 'packet-service')
ModemManager[4496]: <debug> [1453638948.933116] [mm-broadband-modem-mbim.c:1749] basic_connect_notification_packet_service(): Packet service state: 'attaching', data class: '(null)'
ModemManager[4496]: [/dev/cdc-wdm0] Received message...
>>>>>> RAW:
>>>>>>   length = 92
>>>>>>   data   = 07:00:00:80:5C:00:00:00:00:00:00:00:01:00:00:00:00:00:00:00:A2:89:CC:33:BC:BB:8B:4F:B6:B0:13:3E:C2:AA:E6:DF:09:00:00:00:30:00:00:00:13:00:00:00:06:00:00:00:01:00:00:00:20:00:00:00:01:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:02:00:00:00
ModemManager[4496]: [/dev/cdc-wdm0] Received message (translated)...
>>>>>> Header:
>>>>>>   length      = 92
>>>>>>   type        = indicate-status (0x80000007)
>>>>>>   transaction = 0
>>>>>> Fragment header:
>>>>>>   total   = 1
>>>>>>   current = 0
>>>>>> Contents:
>>>>>>   service = 'basic-connect' (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df)
>>>>>>   cid     = 'register-state' (0x00000009)
ModemManager[4496]: <debug> [1453638949.034146] [mm-broadband-modem-mbim.c:1934] device_notification_cb(): Received notification (service 'basic-connect', command 'register-state')
ModemManager[4496]: <info>  [1453638949.034167] [mm-iface-modem-3gpp.c:1179] update_registration_state(): Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state changed (home -> denied)
ModemManager[4496]: <debug> [1453638949.034213] [mm-iface-modem-location.c:295] notify_3gpp_location_update(): Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP location updated (MCC: '0', MNC: '0', Location area code: '0', Cell ID: '0')
ModemManager[4496]: <debug> [1453638949.034265] [mm-iface-modem.c:894] mm_iface_modem_update_access_technologies(): Modem /org/freedesktop/ModemManager1/Modem/0: access technology changed (umts -> unknown)

I am being "denied" by 3GPP. What could be the cause? MCC and MNC are
correct.
-- 
Treat end of file conditions in a uniform manner.
            - The Elements of Programming Style (Kernighan & Plauger)