NetworkManager kann die GSM-Verbindung nicht starten

Ich versuche, eine GSM-Modemverbindung unter Verwendung von NetworkManager in Linux zu konfigurieren.

Die Details des Modems lauten wie folgt:

# mmcli -m 0  /org/freedesktop/ModemManager1/Modem/0 (device id 'f45005b4e117e9572228e3e57af4ead9cc620063') ------------------------- Hardware | manufacturer: 'Sierra Wireless, Incorporated' | model: 'MC7304' | revision: 'SWI9X15C_05.05.58.00 r27038 carmd-fwbuild1 2015/03/04 21:30:23' | supported: 'gsm-umts | lte | gsm-umts, lte' | current: 'gsm-umts, lte' | equipment id: '356853056005343' ------------------------- System | device: '/sys/devices/platform/ocp/47400000.usb/47401400.usb/musb-hdrc.0.auto/usb1/1-1' | drivers: 'option1, qmi_wwan' | plugin: 'Generic' | primary port: 'cdc-wdm0' | ports: 'ttyUSB0 (qcdm), ttyUSB2 (at), cdc-wdm0 (qmi), wwan0 (net)' ------------------------- Numbers | own : 'unknown' ------------------------- Status | lock: 'sim-pin' | unlock retries: 'sim-pin (3), sim-pin2 (0), sim-puk (10), sim-puk2 (10)' | state: 'locked' | power state: 'on' | access tech: 'unknown' | signal quality: '0' (cached) ------------------------- Modes | supported: 'allowed: 2g, 3g, 4g; preferred: none' | current: 'allowed: 2g, 3g, 4g; preferred: none' ------------------------- Bands | supported: 'cdma-bc15-aws, dcs, egsm, pcs, g850, u2100, u1900, u800, u850, u900, eutran-i, eutran-iii, eutran-vii, eutran-viii, eutran-xx' | current: 'cdma-bc15-aws, dcs, egsm, pcs, g850, u2100, u1900, u850, u900, eutran-i, eutran-iii, eutran-vii, eutran-viii, eutran-xx' ------------------------- IP | supported: 'ipv4, ipv6, ipv4v6' ------------------------- SIM | path: '/org/freedesktop/ModemManager1/SIM/0'  ------------------------- Bearers | paths: 'none' 

Ich versuche dann die Verbindung wie folgt hinzuzufügen:

# nmcli c add save yes type gsm ifname cdc-wdm0 con-name gsm autoconnect yes apn gprs.swisscom.ch user gprs password gprs Connection 'gsm' (7acbdf27-9854-4f5a-a5d4-dbfde55e79a3) successfully added. # nmcli c modify gsm gsm.pin **** 

Ich vergewissere mich dann, dass die Verbindung registriert wurde:

# nmcli con NAME UUID TYPE DEVICE gsm 7acbdf27-9854-4f5a-a5d4-dbfde55e79a3 gsm -- Wired connection 2 5059a1aa-9674-4e9f-8a6d-5ef5c5fb4389 802-3-ethernet -- Wired connection 1 76533211-9c38-411d-8e73-c0e2d58a267a 802-3-ethernet eth0 

Dann versuche ich mich anzuschließen:

# nmcli c up gsm Error: Connection activation failed: Connection 'gsm' is not available on the device cdc-wdm0 at this time. 

Hier sind die resultierenden Protokolleinträge:

Feb 27 15:27:29 amg NetworkManager[286]: <info> Auto-activating connection 'gsm'. Feb 27 15:27:29 amg NetworkManager[286]: <info> Activation (cdc-wdm0) starting connection 'gsm' Feb 27 15:27:29 amg NetworkManager[286]: <info> Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) scheduled... Feb 27 15:27:29 amg NetworkManager[286]: <info> Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) started... Feb 27 15:27:29 amg NetworkManager[286]: <info> (cdc-wdm0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Feb 27 15:27:29 amg NetworkManager[286]: <info> (cdc-wdm0): device state change: prepare -> need-auth (reason 'none') [40 60 0] Feb 27 15:27:29 amg NetworkManager[286]: <info> Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) complete. Feb 27 15:27:29 amg NetworkManager[286]: <warn> No agents were available for this request. Feb 27 15:27:29 amg NetworkManager[286]: <info> (cdc-wdm0): device state change: need-auth -> failed (reason 'no-secrets') [60 120 7] Feb 27 15:27:29 amg NetworkManager[286]: <warn> Activation (cdc-wdm0) failed for connection 'gsm' Feb 27 15:27:29 amg NetworkManager[286]: ** (NetworkManager:286): CRITICAL **: mm_modem_simple_disconnect: assertion 'MM_IS_MODEM_SIMPLE (self)' failed Feb 27 15:27:29 amg NetworkManager[286]: <info> (cdc-wdm0): device state change: failed -> disconnected (reason 'none') [120 30 0] Feb 27 15:27:29 amg NetworkManager[286]: <info> (cdc-wdm0): deactivating device (reason 'none') [0] Feb 27 15:28:05 amg NetworkManager[286]: <warn> Failed to activate 'gsm': Connection 'gsm' is not available on the device cdc-wdm0 at this time. 

Was läuft schief? Habe ich etwas falsch konfiguriert? Oder gibt es einen zusätzlichen Schritt? Wie kann ich weiter untersuchen, was falsch läuft?

Es scheint, als wäre dies ein Hinweis:, ** (NetworkManager:286): CRITICAL **: mm_modem_simple_disconnect: assertion 'MM_IS_MODEM_SIMPLE (self)' failedaber ich bin nicht sicher, was das bedeutet.

Jede Hilfe wäre sehr dankbar.