Issue with EM120R-GL on linux

IoT Modules LTE-A Module
1

I have an EM120R-GL module connected over USB to the host running under Linux. It seems that there is some either hardware or driver related issue. Any qmi commands fails with timeout:

$ sudo qmicli --device=/dev/cdc-wdm0 --dms-uim-get-iccid
error: couldn't create client for the 'dms' service: CID allocation failed in the CTL client: Transaction timed out

Where to start debug? Is it some well-known issue?

Host running under Ubuntu 20.04.5 LTS, kernel version 5.10.104.

2

Hi,
Please install the driver according to the linux driver package of the following module. After ls /dev/ttyUSB* can identify the USB of the EM120 module, perform qmi operation. I hope it will be useful to you.

Quectel_LTE&5G_Linux_USB_Driver_V1.0.zip

3

Well, the root of the problem was at+qcfg="usbnet" config. By default it is AT+QCFG="usbnet",2 and qmi requires this config to be AT+QCFG="usbnet",0. After setting correct config it works fine.