固件类型：官方提供的固件
固件文件名称：AIO-3568J-UBUNTU18.04-GPT-20211201-1505
固件下载地址：百度网盘 请输入提取码
Log日志：kernel_userlog.zip
基于UBUNTU18.04，AIO-3568J开发板上接入配套购买的EC20模块。
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通过UBUNTU右上方的网络设置发现模块无法联网。
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直接输入AT命令，检测SIM卡的IMSI信息，没问题。SIM卡为电信卡，如下信息：
firefly@firefly:~$ busybox microcom /dev/ttyUSB2
at+cimi
460115304260332
OK
- 通过命令quectel-CM 配置，wwan0会被down， LOG如下。 其SIM卡状态也是ready的
firefly@firefly:~$ sudo quectel-CM -s ctlte
[04-20_02:37:44:221] QConnectManager_Linux_V1.6.1
[04-20_02:37:44:226] Find /sys/bus/usb/devices/5-1.3 idVendor=0x2c7c idProduct=0x125, bus=0x005, dev=0x003
[04-20_02:37:44:227] Auto find qmichannel = /dev/cdc-wdm0
[04-20_02:37:44:228] Auto find usbnet_adapter = wwan0
[04-20_02:37:44:228] netcard driver = qmi_wwan_q, driver version = 22-Aug-2005
[04-20_02:37:44:229] Modem works in QMI mode
[04-20_02:37:44:243] /proc/992/fd/7 → /dev/cdc-wdm0
[04-20_02:37:44:243] /proc/992/exe → /usr/local/bin/quectel-CM
[04-20_02:37:46:261] cdc_wdm_fd = 7
[04-20_02:37:46:363] Get clientWDS = 4
[04-20_02:37:46:395] Get clientDMS = 1
[04-20_02:37:46:427] Get clientNAS = 4
[04-20_02:37:46:459] Get clientUIM = 1
[04-20_02:37:46:491] Get clientWDA = 1
[04-20_02:37:46:523] requestBaseBandVersion EC20CEFRGR06A04M4G
[04-20_02:37:46:651] requestGetSIMStatus SIMStatus: SIM_READY
[04-20_02:37:46:685] requestGetProfile[1] ctlte///0/IPV4
[04-20_02:37:46:686] requestSetProfile[1] ctlte///0/IPV4
[04-20_02:37:46:686] no need to set skip the rest
[04-20_02:37:46:716] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
[04-20_02:37:46:747] requestQueryDataCall IPv4ConnectionStatus: DISCONNECTED
[04-20_02:37:46:747] ifconfig wwan0 0.0.0.0
[04-20_02:37:46:766] ifconfig wwan0 down
[04-20_02:43:56:829] requestRegistrationState2 MCC: 0, MNC: 0, PS: Detached, DataCap: UNKNOW
附件：
kernel dmesg信息，特别注意1134行以后。
求助，谢谢大家！
tchip_askquestions
kernel_userlog.zip (22.6 KB)