Telit LE910 failing to find network

[Kelvin]

> If I'm not wrong qmi_wwan is trying to bind to interface 5, but rmnet
>> is on 2 (that has been wrongly taken by option). Which kernel version
>> are you using? Did you modify the source code of option and qmi_wwan?
>>
>
> This does indeed look incorrect - the qmi_wwan.c modification on this
> kernel uses 5 but the LE910 documents say to use 2. Good catch, thanks!
>

With the correct change to qmi_wwan.c it now creates /dev/cdc-wdm0 and uses
QMI mode.

Not fully there yet, though, I tried --3gpp-scan and the modem is listed as
disabled:

linaro at linaro-gnome:~$ sudo mmcli -m 0 --3gpp-scan
error: modem not enabled yet

Looking at the modem state:

linaro at linaro-gnome:~$ sudo mmcli -m 0

/org/freedesktop/ModemManager1/Modem/0 (device id
'63d83e4a4663556a1e70904a69dcbb6441c0ba3b')
  -------------------------
  Hardware |   manufacturer: 'QUALCOMM INCORPORATED'
           |          model: 'LE910-EUG'
           |       revision: '17.00.523  1  [July 14 2014 23:00:00]'
           |      supported: 'gsm-umts
           |                  lte
           |                  gsm-umts, lte'
           |        current: 'gsm-umts'
           |   equipment id: '359852053548609'
  -------------------------
  System   |         device:
'/sys/devices/f9400000.ssusb/f9400000.dwc3/xhci-hcd.0.auto/usb1/1-2/1-2.1'
           |        drivers: 'option1, qmi_wwan'
           |         plugin: 'Generic'
           |   primary port: 'cdc-wdm0'
           |          ports: 'ttyUSB2 (at), cdc-wdm0 (qmi), wwan0 (net)'
  -------------------------
  Numbers  |           own : 'unknown'
  -------------------------
  Status   |           lock: 'sim-pin2'
           | unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk (10),
sim-puk2 (10)'
           |          state: 'disabled'
           |    power state: 'on'
           |    access tech: 'unknown'
           | signal quality: '0' (cached)
  -------------------------
  Modes    |      supported: 'allowed: 2g; preferred: none
           |                  allowed: 3g; preferred: none
           |                  allowed: 2g, 3g; preferred: none
           |                  allowed: 2g, 3g; preferred: 2g
           |                  allowed: 2g, 3g; preferred: 3g
           |                  allowed: 2g, 3g, 4g; preferred: none'
           |        current: 'allowed: 2g, 3g; preferred: none'
  -------------------------
  Bands    |      supported: 'dcs, egsm, u2100, u800, u850, u900,
eutran-iii, eutran-vii, eutran-xx'
           |        current: 'dcs, egsm, u2100, u800, u850, u900,
eutran-iii, eutran-vii, eutran-xx'
  -------------------------
  IP       |      supported: 'ipv4, ipv6, ipv4v6'
  -------------------------
  3GPP     |           imei: '359852053548609'
           |  enabled locks: 'none'
           |    operator id: 'unknown'
           |  operator name: 'unknown'
           |   subscription: 'unknown'
           |   registration: 'unknown'
  -------------------------
  SIM      |           path: '/org/freedesktop/ModemManager1/SIM/0'

  -------------------------
  Bearers  |          paths: 'none'



Any hints much appreciated. The full syslog after starting ModemManager in
debug mode is here: https://pastebin.com/KTuS7hDu

Many thanks,
Kelvin.
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