Hey Kelvin, > > 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) >
The 3GPP module should by default auto-register in the best network it finds. When using a SIM card for a provider for which there is a real network available, that should happen instantly, not sure why it's not happening here. Can you try to to explicitly request the home connection with mmcli --3gpp-register-home? Also, can you try to register in a specific network with --3gpp-register-in-operator=[MCCMNC] ? > Is the "EPS supported: No" relevant? The LE910 supports 2G, 3G, 4G. > Since ModemManager 1.6.x we enable by default registration checks in the EPS (LTE) network, it was disabled by default in previous releases. > 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. > Oh, please update to MM 1.6.x and retry, please. MM 1.4.x is quite old, and MM 1.2.x is veeeeeery old. The MM 1.6.x release also comes with a Telit plugin, not available in earlier releases. > 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)' Is this supposed to be a single-TTY modem? > ------------------------- > 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' > > _______________________________________________ > ModemManager-devel mailing list > ModemManager-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel > -- Aleksander https://aleksander.es _______________________________________________ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
