Using a Fibocom L850-GL via USB in a non-Lenovo machine

[Richard Thanki]

Hi all

I’m using the Fibocom L850-GL on a standard PC using an M.2 to USB 2.0 adapter <https://www.aliexpress.com/item/32799715298.html>  I’m getting many of the same issues as discussed in the following thread Fibocom L850-GL hangs upon connect <https://lists.freedesktop.org/archives/modemmanager-devel/2018-August/006543.html>.

As I’m connecting to the modem using USB I assumed that it would boot in MBIM mode, but it certainly hasn’t. I’m new to using modem modules but would love to get this working if possible. Have there been any developments with this modem since the earlier thread?

Rich

Logs attached:


mmcli -V

mmcli 1.10.0
Copyright (2011 - 2019) Aleksander Morgado


mmcli -m 0

  --------------------------------
  General  |            dbus path: /org/freedesktop/ModemManager1/Modem/0
           |            device id: 3967ad95c40c392a440b0c4684749b75bb908795
  --------------------------------
  Hardware |         manufacturer: Fibocom
           |                model: L850 LTE Module","L850
           |             revision: 18500.5001.00.01.01.15
           |            supported: gsm-umts, lte
           |              current: gsm-umts, lte
           |         equipment id: XXXXXXXXXXX
  --------------------------------
  System   |               device: /sys/devices/platform/soc/1c1d000.usb/usb5/5-1
           |              drivers: cdc_acm, cdc_ncm
           |               plugin: Generic
           |         primary port: ttyACM0
           |                ports: enx000011121318 (net), enx000011121314 (net), ttyACM0 (at), 
           |                       enx000011121316 (net), ttyACM2 (at)

lsusb



lsusb -t

/:  Bus 09.Port 1: Dev 1, Class=root_hub, Driver=musb-hdrc/1p, 480M
/:  Bus 08.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/1p, 12M
/:  Bus 07.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/1p, 12M
/:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/1p, 12M
/:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=ehci-platform/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Communications, Driver=cdc_acm, 480M
    |__ Port 1: Dev 2, If 1, Class=CDC Data, Driver=cdc_acm, 480M
    |__ Port 1: Dev 2, If 2, Class=Communications, Driver=cdc_acm, 480M
    |__ Port 1: Dev 2, If 3, Class=CDC Data, Driver=cdc_acm, 480M
    |__ Port 1: Dev 2, If 4, Class=Communications, Driver=cdc_acm, 480M
    |__ Port 1: Dev 2, If 5, Class=CDC Data, Driver=cdc_acm, 480M
    |__ Port 1: Dev 2, If 6, Class=Communications, Driver=cdc_ncm, 480M
    |__ Port 1: Dev 2, If 7, Class=CDC Data, Driver=cdc_ncm, 480M
    |__ Port 1: Dev 2, If 8, Class=Communications, Driver=cdc_ncm, 480M
    |__ Port 1: Dev 2, If 9, Class=CDC Data, Driver=cdc_ncm, 480M
    |__ Port 1: Dev 2, If 10, Class=Communications, Driver=cdc_ncm, 480M
    |__ Port 1: Dev 2, If 11, Class=CDC Data, Driver=cdc_ncm, 480M
    |__ Port 1: Dev 2, If 12, Class=Vendor Specific Class, Driver=, 480M


dmesg

[    2.493587] usb 5-1: new high-speed USB device number 2 using ehci-platform
[    2.658494] usb 5-1: New USB device found, idVendor=8087, idProduct=095a, bcdDevice= 3.33
[    2.658506] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    2.658512] usb 5-1: Product: MODEM + 2 CDC-ACM + 3 CDC-NCM + SS
[    2.658518] usb 5-1: Manufacturer: Intel Corp.
[    2.658523] usb 5-1: SerialNumber: XXXXXXXXXX
…..
[    7.232211] cdc_acm 5-1:1.0: ttyACM0: USB ACM device
[    7.237292] cdc_acm 5-1:1.2: ttyACM1: USB ACM device
[    7.266473] cdc_acm 5-1:1.4: ttyACM2: USB ACM device
[    7.272899] usbcore: registered new interface driver cdc_acm
[    7.272908] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[    7.315467] cdc_ncm 5-1:1.6: MAC-Address: 00:00:11:12:13:14
[    7.315480] cdc_ncm 5-1:1.6: setting rx_max = 16384
[    7.316874] cdc_ncm 5-1:1.6 usb0: register 'cdc_ncm' at usb-1c1d000.usb-1, CDC NCM, 00:00:11:12:13:14
[    7.345111] cdc_ncm 5-1:1.8: MAC-Address: 00:00:11:12:13:16
[    7.345126] cdc_ncm 5-1:1.8: setting rx_max = 16384
[    7.349142] cdc_ncm 5-1:1.8 usb1: register 'cdc_ncm' at usb-1c1d000.usb-1, CDC NCM, 00:00:11:12:13:16
[    7.387223] cdc_ncm 5-1:1.10: MAC-Address: 00:00:11:12:13:18
[    7.387238] cdc_ncm 5-1:1.10: setting rx_max = 16384
[    7.388760] cdc_ncm 5-1:1.10 usb2: register 'cdc_ncm' at usb-1c1d000.usb-1, CDC NCM, 00:00:11:12:13:18
[    7.388909] usbcore: registered new interface driver cdc_ncm
[    7.406123] usbcore: registered new interface driver cdc_wdm
[    7.463017] usbcore: registered new interface driver cdc_mbim
…
[    7.597777] cdc_ncm 5-1:1.10 enx000011121318: renamed from usb2
[    7.624113] cdc_ncm 5-1:1.8 enx000011121316: renamed from usb1
[    7.652860] cdc_ncm 5-1:1.6 enx000011121314: renamed from usb0


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