问题描述
我需要配置[TRM240调制解调器] [1]以与Raspbian系统一起使用。我按照答案[此处] [2]中报告的步骤进行操作，但是连接不起作用。
我附上一些截图，记录了我发出的过程和命令。
首先，寻找连接的调制解调器：
pi@raspBerrypi:~ $ mmcli -L
Found 1 modems:
/org/freedesktop/Modemmanager1/Modem/0 [QUALCOMM INCORPORATED] QUECTEL Mobile broadband Module
检查找到的唯一调制解调器：
pi@raspBerrypi:~ $ mmcli -m 0
/org/freedesktop/Modemmanager1/Modem/0 (device id 'e308f44de689f834e8cbc5b2122a4ffca8ddd3f5')
-------------------------
Hardware | manufacturer: 'QUALCOMM INCORPORATED'
| model: 'QUECTEL Mobile broadband Module'
| revision: 'EC21ECGAR06A04M1G'
| supported: 'gsm-umts
| lte
| gsm-umts,lte'
| current: 'gsm-umts,lte'
| equipment id: '864394040056931'
-------------------------
System | device: '/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2'
| drivers: 'option1,qmi_wwan'
| plugin: 'Generic'
| primary port: 'cdc-wdm0'
| ports: 'ttyUSB0 (qcdm),ttyUSB2 (at),cdc-wdm0 (qmi),wwan0 (net),ttyUSB3 (at)'
-------------------------
Numbers | own : 'unkNown'
-------------------------
Status | lock: 'unkNown'
| unlock retries: 'unkNown'
| state: 'Failed'
| Failed reason: 'sim-missing'
| power state: 'unkNown'
| access tech: 'unkNown'
| signal quality: '0' (cached)
-------------------------
Modes | supported: 'allowed: 2g,3g,4g; preferred: none'
| current: 'allowed: any; preferred: none'
-------------------------
Bands | supported: 'unkNown'
| current: 'unkNown'
-------------------------
IP | supported: 'ipv4,ipv6,ipv4v6'
-------------------------
SIM | path: 'none'
-------------------------
Bearers | paths: 'none'
我为ifname使用了以下选项尝试了以下命令：cdc-wdm0，ttyUSB2和ttyUSB3。它们最终都得到相同的结果。
pi@raspBerrypi:~ $ sudo nmcli c add type gsm ifname cdc-wdm0 con-name modem apn mobile.vodafone.it
Connection 'modem' (9c34027f-5df5-4fd6-9792-223e225dfd41) successfully added.
检查连接并尝试占用调制解调器：
pi@raspBerrypi:~ $ nmcli con
NAME UUID TYPE DEVICE
br-12ff13c2c4e0 26450e11-6671-47c2-91af-6bf96405921b bridge br-12ff13c2c4e0
br-acc4bdcbe6e7 440cfcc0-5318-4a9e-9259-3fb8700cf240 bridge br-acc4bdcbe6e7
docker0 8af67071-3cb2-4235-882f-1cc1f50fa7ca bridge docker0
modem 9c34027f-5df5-4fd6-9792-223e225dfd41 gsm --
尝试使用：
pi@raspBerrypi:~ $ nmcli con up modem
Error: Connection activation Failed: No suitable device found for this connection.
NetworkManager服务状态：
pi@raspBerrypi:~ $ systemctl status NetworkManager
● NetworkManager.service - Network Manager
Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2020-08-21 07:46:57 UTC; 2h 35min ago
Docs: man:NetworkManager(8)
Main PID: 710 (NetworkManager)
Tasks: 3 (limit: 4915)
Memory: 13.8M
cpu: 3.862s
CGroup: /system.slice/NetworkManager.service
└─710 /usr/sbin/NetworkManager --no-daemon
Aug 21 07:48:53 raspBerrypi NetworkManager[710]: <info> [1597996133.0883] device (veth6ffb100): link connected
Aug 21 08:14:11 raspBerrypi NetworkManager[710]: <error> [1597997651.4341] audit: Failed to open auditd socket: Protocol not supported
Aug 21 08:14:11 raspBerrypi NetworkManager[710]: <info> [1597997651.4343] audit: op="device-managed" arg="managed:1" pid=11841 uid=0 result="success"
Aug 21 08:16:48 raspBerrypi NetworkManager[710]: <info> [1597997808.9388] audit: op="device-autoconnect" arg="autoconnect:1" pid=12910 uid=1000 result="fail" reason="Not authorized to perform this operat
Aug 21 08:17:41 raspBerrypi NetworkManager[710]: <info> [1597997861.0575] audit: op="connection-add-activate" pid=13286 uid=1000 result="fail" reason="gsm: GSM mobile broadband connection requires a 'gsm
Aug 21 08:25:25 raspBerrypi NetworkManager[710]: <info> [1597998325.2594] audit: op="connection-add-activate" pid=16224 uid=1000 result="fail" reason="gsm: GSM mobile broadband connection requires a 'gsm
Aug 21 10:06:31 raspBerrypi NetworkManager[710]: <info> [1598004391.9223] audit: op="connection-activate" uuid="06583333-e03e-431f-9376-94c38b6b607d" name="modem" result="fail" reason="No suitable device
Aug 21 10:19:24 raspBerrypi NetworkManager[710]: <info> [1598005164.3349] keyfile: add connection /etc/NetworkManager/system-connections/modem-9c34027f-5df5-4fd6-9792-223e225dfd41 (9c34027f-5df5-4fd6-979
Aug 21 10:19:24 raspBerrypi NetworkManager[710]: <info> [1598005164.3386] audit: op="connection-add" uuid="9c34027f-5df5-4fd6-9792-223e225dfd41" name="modem" pid=27261 uid=0 result="success"
Aug 21 10:20:29 raspBerrypi NetworkManager[710]: <info> [1598005229.6409] audit: op="connection-activate" uuid="06583333-e03e-431f-9376-94c38b6b607d" name="modem" result="fail" reason="No suitable device
lines 1-21/21 (END)
在这里我看到错误<error> [1597997651.4341] audit: Failed to open auditd socket: Protocol not supported ...
pi@raspBerrypi:~ $ systemctl status Modemmanager
● Modemmanager.service - Modem Manager
Loaded: loaded (/lib/systemd/system/Modemmanager.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2020-08-21 07:46:57 UTC; 2h 35min ago
Main PID: 712 (Modemmanager)
Tasks: 5 (limit: 4915)
Memory: 8.7M
cpu: 4.123s
CGroup: /system.slice/Modemmanager.service
├─712 /usr/sbin/Modemmanager
└─884 /usr/lib/libqmi/qmi-proxy
Aug 21 07:47:19 raspBerrypi Modemmanager[712]: [/dev/cdc-wdm0] Registered 'nas' (version 1.25) client with ID '2'
Aug 21 07:47:20 raspBerrypi Modemmanager[712]: [/dev/cdc-wdm0] Allocating new client ID...
Aug 21 07:47:20 raspBerrypi Modemmanager[712]: [/dev/cdc-wdm0] Registered 'wms' (version 1.10) client with ID '1'
Aug 21 07:47:20 raspBerrypi Modemmanager[712]: [/dev/cdc-wdm0] Allocating new client ID...
Aug 21 07:47:20 raspBerrypi Modemmanager[712]: [/dev/cdc-wdm0] Registered 'uim' (version 1.46) client with ID '1'
Aug 21 07:47:20 raspBerrypi Modemmanager[712]: <warn> (ttyUSB2): port attributes not fully set
Aug 21 07:47:20 raspBerrypi Modemmanager[712]: <warn> Couldn't load Supported Bands: 'QMI operation Failed: Cannot send message: QMI service 'dms' version '1.1' required,got version '1.0''
Aug 21 07:47:20 raspBerrypi Modemmanager[712]: <warn> Couldn't load Power State: 'QMI operation Failed: Cannot send message: QMI service 'dms' version '1.1' required,got version '1.0''
Aug 21 07:47:55 raspBerrypi Modemmanager[712]: <warn> Modem Couldn't be initialized: Couldn't check unlock status: Couldn't get SIM lock status after 6 retries
Aug 21 07:47:55 raspBerrypi Modemmanager[712]: <info> Modem: state changed (unkNown -> Failed)
系统信息：
pi@raspBerrypi:~ $ uname -a
Linux raspBerrypi 4.19.66-v7+ #1253 SMP Thu Aug 15 11:49:46 BST 2019 armv7l GNU/Linux
pi@raspBerrypi:~ $ lsb_release -a
No LSB modules are available.
distributor ID: Raspbian
Description: Raspbian GNU/Linux 9.13 (stretch)
Release: 9.13
Codename: stretch
解决方法
可能是SIM卡无法正常工作或调制解调器无法识别它。
这就是输出
-------------------------
Status | lock: 'unknown'
| unlock retries: 'unknown'
| state: 'failed'
| failed reason: 'sim-missing'
| power state: 'unknown'
| access tech: 'unknown'
| signal quality: '0' (cached)
-------------------------
指出。
选中this answer。 （我在发布问题之前没有找到它。）