LN920: MBIM Bands not shown (MM 1.18.2)

[Amol Lad]

Hi Daniele,

I'm patched my MM 1.18.2 with your MR (LN920 Initial Support) and testing LN920 in MBIM mode. I'm noticing that the "supported" and "current" bands are not shown in "mmcli -m 0" output and below error is seen in the logs:

<warn>  [modem0] couldn't load supported bands: Could not find 4G band flags from response

Any suggestion what could be going wrong?

mmcli -m 0 output in both MBIM and QMI is below:


MBIM
----

# mmcli -m 0
  ----------------------------------
  General  |                   path: /org/freedesktop/ModemManager1/Modem/0
           |              device id: 168c2aa5755860bee3694899a635af0df25e7fcf
  ----------------------------------
  Hardware |           manufacturer: Telit Wireless Solutions
           |                  model: LN920
           |      firmware revision: SDX12.LE.1.0-00085-NBOOT.NEFS.
           |         carrier config: default
           |           h/w revision: LN920A12-WW
           |              supported: gsm-umts, lte
           |                current: gsm-umts, lte
           |           equipment id: 354175759991229
  ----------------------------------
  System   |                 device: /sys/devices/platform/soc/soc:internal-regs/f10f0000.usb3/usb2/2-1
           |                drivers: cdc_mbim, option1
           |                 plugin: telit
           |           primary port: cdc-wdm0
           |                  ports: cdc-wdm0 (mbim), ttyUSB0 (ignored), ttyUSB1 (gps),
           |                         ttyUSB2 (at), ttyUSB3 (at), ttyUSB4 (ignored), wwan0 (net)
  ----------------------------------
  Numbers  |                    own: 9108813566
  ----------------------------------
  Status   |         unlock retries: sim-pin2 (3)
           |                  state: connected
           |            power state: on
           |            access tech: lte
           |         signal quality: 12% (recent)
  ----------------------------------
  Modes    |              supported: allowed: 3g; preferred: none
           |                         allowed: 4g; preferred: none
           |                         allowed: 3g, 4g; preferred: none
           |                current: allowed: 4g; preferred: none
  ----------------------------------
  IP       |              supported: ipv4, ipv6, ipv4v6
  ----------------------------------
  3GPP     |                   imei: 354175759991229
           |          enabled locks: fixed-dialing
           |            operator id: 40445
           |          operator name: airtel
           |           registration: home
  ----------------------------------
  3GPP EPS |   ue mode of operation: csps-2
           |    initial bearer path: /org/freedesktop/ModemManager1/Bearer/0
           | initial bearer ip type: ipv4v6
  ----------------------------------
  SIM      |       primary sim path: /org/freedesktop/ModemManager1/SIM/0
           |         sim slot paths: slot 1: /org/freedesktop/ModemManager1/SIM/0 (active)
           |                         slot 2: /org/freedesktop/ModemManager1/SIM/1
  ----------------------------------
  Bearer   |                  paths: /org/freedesktop/ModemManager1/Bearer/1


QMI
---

  ----------------------------------
  General  |                   path: /org/freedesktop/ModemManager1/Modem/0
           |              device id: 5c1922b03727107842603eccdea2bb4cd26436f5
  ----------------------------------
  Hardware |           manufacturer: Telit
           |                  model: LN920A12-WW
           |      firmware revision: M0L.000000-A006
           |         carrier config: default
           |           h/w revision: 10001
           |              supported: gsm-umts, lte
           |                current: gsm-umts, lte
           |           equipment id: 354175759991229
  ----------------------------------
  System   |                 device: /sys/devices/platform/soc/soc:internal-regs/f10f0000.usb3/usb2/2-1
           |                drivers: option1, qmi_wwan
           |                 plugin: telit
           |           primary port: cdc-wdm0
           |                  ports: cdc-wdm0 (qmi), ttyUSB0 (ignored), ttyUSB1 (gps),
           |                         ttyUSB2 (at), ttyUSB3 (at), ttyUSB4 (ignored), wwan0 (net)
  ----------------------------------
  Numbers  |                    own: 9108813566
  ----------------------------------
  Status   |                   lock: sim-pin2
           |         unlock retries: sim-pin (3), sim-pin2 (3), sim-puk (10), sim-puk2 (10)
           |                  state: connected
           |            power state: on
           |            access tech: lte
           |         signal quality: 42% (recent)
  ----------------------------------
  Modes    |              supported: allowed: 3g; preferred: none
           |                         allowed: 4g; preferred: none
           |                         allowed: 3g, 4g; preferred: 4g
           |                         allowed: 3g, 4g; preferred: 3g
           |                current: allowed: 4g; preferred: none
  ----------------------------------
  Bands    |              supported: utran-1, utran-3, utran-4, utran-6, utran-5, utran-8,
           |                         utran-9, utran-2, eutran-1, eutran-2, eutran-3, eutran-4, eutran-5,
           |                         eutran-7, eutran-8, eutran-12, eutran-13, eutran-14, eutran-17,
           |                         eutran-18, eutran-19, eutran-20, eutran-25, eutran-26, eutran-28,
           |                         eutran-29, eutran-30, eutran-38, eutran-39, eutran-40, eutran-41,
           |                         eutran-42, eutran-43, eutran-48, eutran-66, eutran-71, utran-19
           |                current: eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7,
           |                         eutran-8, eutran-12, eutran-13, eutran-14, eutran-17, eutran-18,
           |                         eutran-19, eutran-20, eutran-25, eutran-26, eutran-28, eutran-29,
           |                         eutran-30, eutran-38, eutran-39, eutran-40, eutran-41, eutran-42,
           |                         eutran-43, eutran-48, eutran-66, eutran-71
  ----------------------------------
  IP       |              supported: ipv4, ipv6, ipv4v6
  ----------------------------------
  3GPP     |                   imei: 354175759991229
           |          enabled locks: fixed-dialing
           |            operator id: 40445
           |          operator name: airtel
           |           registration: home
  ----------------------------------
  3GPP EPS |   ue mode of operation: csps-2
           |    initial bearer path: /org/freedesktop/ModemManager1/Bearer/0
           | initial bearer ip type: ipv4v6
  ----------------------------------
  SIM      |       primary sim path: /org/freedesktop/ModemManager1/SIM/0
           |         sim slot paths: slot 1: /org/freedesktop/ModemManager1/SIM/0 (active)
           |                         slot 2: /org/freedesktop/ModemManager1/SIM/1
  ----------------------------------
  Bearer   |                  paths: /org/freedesktop/ModemManager1/Bearer/1