Hi, I'm working with a Telit LE910 modem for which ModemManager is constantly looping unable to find a network: Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> Running registration checks (CS: 'yes', PS: 'yes', EPS: 'no') Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> (ttyUSB8) device open count is 2 (open) Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> (ttyUSB8): --> 'AT+CREG?<CR>' Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> (ttyUSB8): <-- '<CR><LF>+CREG: 2,2<CR><LF><CR><LF>OK<CR><LF>' Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> (ttyUSB8) device open count is 3 (open) Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> (ttyUSB8) device open count is 2 (close) Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> (ttyUSB8): --> 'AT+CGREG?<CR>' Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> (ttyUSB8): <-- '<CR><LF>+CGREG: 2,2<CR><LF><CR><LF>OK<CR><LF>' Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> (ttyUSB8) device open count is 1 (close) Jul 17 08:05:45 linaro-gnome ModemManager[10429]: <debug> Modem not yet registered in a 3GPP network... will recheck soon
Scanning for networks there are plenty available, and I have tried SIM cards for both EE and O2: sudo mmcli -m 1 --3gpp-scan --timeout=300 Found 11 networks: 23410 - O2 - UK (gsm, available) 23415 - vodafone UK (umts, available) 23415 - vodafone UK (lte, available) 23410 - O2 - UK (lte, available) 23415 - vodafone UK (gsm, available) 23430 - EE (gsm, available) 23410 - O2 - UK (umts, available) 23420 - 3 UK (umts, available) 23430 - EE (umts, available) 23420 - 3 UK (lte, available) 23430 - EE (lte, available) Is the "EPS supported: No" relevant? The LE910 supports 2G, 3G, 4G. This is running on an embedded ARM device with a fairly old Ubuntu - ModemManager was on 1.2.0. I've tried upgrading to 1.4.0 and the behaviour is the same. A bit more mmcli info below. Any hints would be much appreciated. Many thanks, Kelvin. /org/freedesktop/ModemManager1/Modem/1 (device id '09c17ce0710e6316d160278ddd03f542021ac6ad') ------------------------- Hardware | manufacturer: 'Telit' | model: 'LE910-EUG' | revision: '17.00.523' | supported: 'gsm-umts, lte' | current: 'gsm-umts, lte' | equipment id: '359852053548609' ------------------------- System | device: '/sys/devices/f9400000.ssusb/f9400000.dwc3/xhci-hcd.0.auto/usb1/1-2/1-2.1' | drivers: 'option1' | plugin: 'Generic' | primary port: 'ttyUSB8' | ports: 'ttyUSB8 (at)' ------------------------- Numbers | own : 'unknown' ------------------------- Status | lock: 'none' | unlock retries: 'unknown' | state: 'searching' | 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: 'unknown' | current: 'unknown' ------------------------- IP | supported: 'ipv4, ipv6, ipv4v6' ------------------------- 3GPP | imei: '359852053548609' | enabled locks: 'none' | operator id: 'unknown' | operator name: 'unknown' | subscription: 'unknown' | registration: 'searching' ------------------------- SIM | path: '/org/freedesktop/ModemManager1/SIM/0' ------------------------- Bearers | paths: 'none'
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