Xubuntu 14.04 (MM-1.0.0) - SYSLOG system loaded, I remove modem and soon put it to the USB port checking: xubuntu@xubuntu:~/Desktop$ ls /dev/ttyUSB* /dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2 /dev/ttyUSB3 ................................................. Jul 11 18:36:39 xubuntu ModemManager[1767]: (tty/ttyUSB0): released by modem /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4 Jul 11 18:36:39 xubuntu kernel: [ 689.376897] usb 1-4: USB disconnect, device number 3 Jul 11 18:36:39 xubuntu kernel: [ 689.377076] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0 Jul 11 18:36:39 xubuntu kernel: [ 689.377092] sierra 1-4:1.0: device disconnected Jul 11 18:36:53 xubuntu kernel: [ 703.284026] usb 1-4: new high-speed USB device number 4 using ehci-pci Jul 11 18:36:53 xubuntu kernel: [ 703.417446] usb 1-4: config 1 has an invalid interface number: 7 but max is 4 Jul 11 18:36:53 xubuntu kernel: [ 703.417449] usb 1-4: config 1 has no interface number 2 Jul 11 18:36:53 xubuntu kernel: [ 703.418942] usb 1-4: New USB device found, idVendor=1199, idProduct=68a3 Jul 11 18:36:53 xubuntu kernel: [ 703.418944] usb 1-4: New USB device strings: Mfr=3, Product=2, SerialNumber=4 Jul 11 18:36:53 xubuntu kernel: [ 703.418946] usb 1-4: Product: AC318U Jul 11 18:36:53 xubuntu kernel: [ 703.418948] usb 1-4: Manufacturer: Sierra Wireless, Incorporated Jul 11 18:36:53 xubuntu kernel: [ 703.418950] usb 1-4: SerialNumber: 111111111111111 Jul 11 18:36:53 xubuntu kernel: [ 703.422014] sierra 1-4:1.0: Sierra USB modem converter detected Jul 11 18:36:53 xubuntu kernel: [ 703.424312] usb 1-4: Sierra USB modem converter now attached to ttyUSB0 Jul 11 18:36:53 xubuntu kernel: [ 703.424387] sierra 1-4:1.1: Sierra USB modem converter detected Jul 11 18:36:53 xubuntu kernel: [ 703.424773] usb 1-4: Sierra USB modem converter now attached to ttyUSB1 Jul 11 18:36:53 xubuntu kernel: [ 703.424840] sierra 1-4:1.3: Sierra USB modem converter detected Jul 11 18:36:53 xubuntu kernel: [ 703.425135] usb 1-4: Sierra USB modem converter now attached to ttyUSB2 Jul 11 18:36:53 xubuntu kernel: [ 703.425218] sierra 1-4:1.4: Sierra USB modem converter detected Jul 11 18:36:53 xubuntu kernel: [ 703.425514] usb 1-4: Sierra USB modem converter now attached to ttyUSB3 Jul 11 18:36:53 xubuntu mtp-probe: checking bus 1, device 4: "/sys/devices/pci0000:00/0000:00:02.1/usb1/1-4" Jul 11 18:36:53 xubuntu mtp-probe: bus: 1, device: 4 was not an MTP device Jul 11 18:36:53 xubuntu ModemManager[1767]: (ttyUSB2): port attributes not fully set Jul 11 18:36:53 xubuntu ModemManager[1767]: (ttyUSB0): port attributes not fully set Jul 11 18:36:53 xubuntu ModemManager[1767]: (ttyUSB1): port attributes not fully set Jul 11 18:36:53 xubuntu ModemManager[1767]: (ttyUSB3): port attributes not fully set Jul 11 18:36:54 xubuntu kernel: [ 703.755434] sierra_net 1-4:1.7 wwan0: register 'sierra_net' at usb-0000:00:02.1-4, Sierra Wireless USB-to-WWAN Modem, 0e:04:e9:60:01:07 Jul 11 18:36:54 xubuntu kernel: [ 703.756747] usbcore: registered new interface driver sierra_net Jul 11 18:36:54 xubuntu NetworkManager[2342]: SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.7/net/wwan0, iface: wwan0) Jul 11 18:36:54 xubuntu NetworkManager[2342]: SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.7/net/wwan0, iface: wwan0): no ifupdown configuration found. Jul 11 18:37:05 xubuntu ModemManager[1767]: Creating modem with plugin 'Sierra (legacy)' and '5' ports Jul 11 18:37:05 xubuntu ModemManager[1767]: Could not grab port (tty/ttyUSB1): 'Cannot add port 'tty/ttyUSB1', unhandled serial type' Jul 11 18:37:05 xubuntu ModemManager[1767]: Could not grab port (tty/ttyUSB0): 'Cannot add port 'tty/ttyUSB0', unhandled serial type' Jul 11 18:37:05 xubuntu ModemManager[1767]: (ttyUSB2): port attributes not fully set Jul 11 18:37:05 xubuntu ModemManager[1767]: Modem for device at '/sys/devices/pci0000:00/0000:00:02.1/usb1/1-4' successfully created Jul 11 18:37:09 xubuntu ModemManager[1767]: Modem: state changed (unknown -> disabled) Jul 11 18:37:09 xubuntu NetworkManager[2342]: (ttyUSB2): failed to look up interface index Jul 11 18:37:09 xubuntu NetworkManager[2342]: (ttyUSB2): new Broadband device (driver: 'sierra, sierra_net' ifindex: 0) Jul 11 18:37:09 xubuntu NetworkManager[2342]: (ttyUSB2): exported as /org/freedesktop/NetworkManager/Devices/1 Jul 11 18:37:09 xubuntu NetworkManager[2342]: (ttyUSB2): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Jul 11 18:37:09 xubuntu NetworkManager[2342]: (ttyUSB2): deactivating device (reason 'managed') [2] Jul 11 18:37:09 xubuntu NetworkManager[2342]: (ttyUSB2): device state change: unavailable -> disconnected (reason 'none') [20 30 0] .......................................... now checking: xubuntu@xubuntu:~/Desktop$ ls /dev/ttyUSB* /dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2 /dev/ttyUSB3 [ attention! in Xubuntu 16,04 and Debian 8.5 show only: /dev/ttyUSB0 ] xubuntu@xubuntu:~/Desktop$ xubuntu@xubuntu:~/Desktop$ mmcli -L Found 1 modems: /org/freedesktop/ModemManager1/Modem/0 [Sierra Wireless, Incorporated] AC318U [ attention! in Xubuntu 16,04 and Debian 8.5: "No modems were found" ] xubuntu@xubuntu:~/Desktop$ mmcli -m 0 /org/freedesktop/ModemManager1/Modem/0 (device id '1ac66068f30ff6ed7cb58459eba4b18bd13a1405') ------------------------- Hardware | manufacturer: 'Sierra Wireless, Incorporated' | model: 'AC318U' | revision: 'T1_0_3_2AP R361 CKPRXD00000031 2011/04/15 17:40:48' etc... Menu "New mobile modem connection" is displayed in the menu NM (modem recognized and visible) I create my profile 'T-mobile Default' (country, APN, etc...) ........................................ Jul 11 18:46:15 xubuntu NetworkManager[2342]: Activation (ttyUSB2) starting connection 'T-mobile Default' Jul 11 18:46:15 xubuntu NetworkManager[2342]: (ttyUSB2): device state change: disconnected -> prepare (reason 'none') [30 40 0] Jul 11 18:46:15 xubuntu NetworkManager[2342]: NetworkManager state is now CONNECTING Jul 11 18:46:15 xubuntu NetworkManager[2342]: Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) scheduled... Jul 11 18:46:15 xubuntu NetworkManager[2342]: Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) started... Jul 11 18:46:15 xubuntu NetworkManager[2342]: Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) complete. Jul 11 18:46:15 xubuntu ModemManager[1767]: Simple connect started... Jul 11 18:46:15 xubuntu ModemManager[1767]: Simple connect state (3/8): Enable Jul 11 18:46:15 xubuntu ModemManager[1767]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (disabled -> enabling) Jul 11 18:46:15 xubuntu NetworkManager[2342]: (ttyUSB2) modem state changed, 'disabled' --> 'enabling' (reason: user-requested) Jul 11 18:46:15 xubuntu ModemManager[1767]: (ttyUSB2): port attributes not fully set Jul 11 18:46:15 xubuntu ModemManager[1767]: (ttyUSB3): port attributes not fully set Jul 11 18:46:16 xubuntu ModemManager[1767]: Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state changed (unknown -> registering) Jul 11 18:46:16 xubuntu ModemManager[1767]: Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state changed (registering -> home) Jul 11 18:46:16 xubuntu ModemManager[1767]: Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP location updated (MCC: '0', MNC: '0', Location area code: 'DFDE', Cell ID: '2BEAC7D') Jul 11 18:46:16 xubuntu ModemManager[1767]: Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP location updated (MCC: '260', MNC: '2', Location area code: 'DFDE', Cell ID: '2BEAC7D') Jul 11 18:46:17 xubuntu ModemManager[1767]: (tty/ttyUSB0): released by modem /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4 Jul 11 18:46:17 xubuntu kernel: [ 1267.164092] usb 1-4: USB disconnect, device number 4 Jul 11 18:46:17 xubuntu kernel: [ 1267.164273] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0 Jul 11 18:46:17 xubuntu kernel: [ 1267.164287] sierra 1-4:1.0: device disconnected Jul 11 18:46:17 xubuntu kernel: [ 1267.166529] sierra ttyUSB1: Sierra USB modem converter now disconnected from ttyUSB1 Jul 11 18:46:17 xubuntu kernel: [ 1267.166550] sierra 1-4:1.1: device disconnected Jul 11 18:46:17 xubuntu ModemManager[1767]: mm_serial_port_close: assertion 'priv->open_count > 0' failed Jul 11 18:46:17 xubuntu ModemManager[1767]: (tty/ttyUSB1): released by modem /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4 Jul 11 18:46:17 xubuntu ModemManager[1767]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (enabling -> registered) Jul 11 18:46:17 xubuntu ModemManager[1767]: Simple connect state (4/8): Wait to get fully enabled Jul 11 18:46:17 xubuntu ModemManager[1767]: Simple connect state (5/8): Register Jul 11 18:46:17 xubuntu ModemManager[1767]: Simple connect state (6/8): Bearer Jul 11 18:46:17 xubuntu NetworkManager[2342]: (ttyUSB2) modem state changed, 'enabling' --> 'registered' (reason: user-requested) Jul 11 18:46:17 xubuntu NetworkManager[2342]: WWAN now enabled by management service Jul 11 18:46:17 xubuntu kernel: [ 1267.169022] sierra ttyUSB2: Sierra USB modem converter now disconnected from ttyUSB2 Jul 11 18:46:17 xubuntu kernel: [ 1267.169035] sierra 1-4:1.3: device disconnected Jul 11 18:46:17 xubuntu kernel: [ 1267.169923] ModemManager[1767]: segfault at 28 ip 00000000004328f0 sp 00007ffce20cbc78 error 4 in ModemManager[400000+df000] Jul 11 18:46:17 xubuntu kernel: [ 1267.173917] sierra ttyUSB3: Sierra USB modem converter now disconnected from ttyUSB3 Jul 11 18:46:17 xubuntu kernel: [ 1267.173930] sierra 1-4:1.4: device disconnected Jul 11 18:46:17 xubuntu avahi-daemon[1463]: Withdrawing workstation service for wwan0. Jul 11 18:46:17 xubuntu kernel: [ 1267.176343] sierra_net 1-4:1.7 wwan0: unregister 'sierra_net' usb-0000:00:02.1-4, Sierra Wireless USB-to-WWAN Modem Jul 11 18:46:17 xubuntu NetworkManager[2342]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.7/net/wwan0, iface: wwan0) Jul 11 18:46:17 xubuntu kernel: [ 1267.209051] sierra_net 1-4:1.7 wwan0 (unregistered): usb_control_msg failed, status -19 Jul 11 18:46:18 xubuntu NetworkManager[2342]: ModemManager disappeared from bus Jul 11 18:46:18 xubuntu NetworkManager[2342]: (ttyUSB2): device state change: prepare -> unmanaged (reason 'removed') [40 10 36] Jul 11 18:46:18 xubuntu NetworkManager[2342]: (ttyUSB2): deactivating device (reason 'removed') [36] Jul 11 18:46:18 xubuntu NetworkManager[2342]: (ttyUSB2): cleaning up... Jul 11 18:46:18 xubuntu NetworkManager[2342]: (ttyUSB2): taking down device. Jul 11 18:46:18 xubuntu kernel: [ 1268.393578] init: modemmanager main process (1767) killed by SEGV signal Jul 11 18:46:18 xubuntu kernel: [ 1268.393594] init: modemmanager main process ended, respawning Jul 11 18:46:18 xubuntu ModemManager[5083]: ModemManager (version 1.0.0) starting... Jul 11 18:46:18 xubuntu NetworkManager[2342]: Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889) Jul 11 18:46:18 xubuntu NetworkManager[2342]: Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889) Jul 11 18:46:18 xubuntu NetworkManager[2342]: NetworkManager state is now CONNECTED_GLOBAL Jul 11 18:46:18 xubuntu NetworkManager[2342]: Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889) Jul 11 18:46:18 xubuntu NetworkManager[2342]: (ttyUSB2) failed to connect modem: Message did not receive a reply (timeout by message bus) Jul 11 18:46:18 xubuntu NetworkManager[2342]: nm_device_get_state: assertion 'NM_IS_DEVICE (device)' failed Jul 11 18:46:18 xubuntu NetworkManager[2342]: modem_prepare_result: assertion 'state == NM_DEVICE_STATE_PREPARE' failed Jul 11 18:46:18 xubuntu NetworkManager[2342]: ModemManager disappeared from bus Jul 11 18:46:18 xubuntu NetworkManager[2342]: (ttyUSB2) failed to disconnect modem: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name :1.10 was not provided by any .service files Jul 11 18:46:18 xubuntu NetworkManager[2342]: ModemManager available in the bus Jul 11 18:46:21 xubuntu kernel: [ 1270.992026] usb 1-4: new high-speed USB device number 5 using ehci-pci Jul 11 18:46:21 xubuntu ModemManager[5083]: Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:0a.0': not supported by any plugin Jul 11 18:46:21 xubuntu kernel: [ 1271.125460] usb 1-4: config 1 has an invalid interface number: 7 but max is 4 Jul 11 18:46:21 xubuntu kernel: [ 1271.125464] usb 1-4: config 1 has no interface number 2 Jul 11 18:46:21 xubuntu kernel: [ 1271.126955] usb 1-4: New USB device found, idVendor=1199, idProduct=68a3 Jul 11 18:46:21 xubuntu kernel: [ 1271.126957] usb 1-4: New USB device strings: Mfr=3, Product=2, SerialNumber=4 Jul 11 18:46:21 xubuntu kernel: [ 1271.126960] usb 1-4: Product: AC318U Jul 11 18:46:21 xubuntu kernel: [ 1271.126962] usb 1-4: Manufacturer: Sierra Wireless, Incorporated Jul 11 18:46:21 xubuntu kernel: [ 1271.126963] usb 1-4: SerialNumber: 111111111111111 Jul 11 18:46:21 xubuntu kernel: [ 1271.130032] sierra 1-4:1.0: Sierra USB modem converter detected Jul 11 18:46:21 xubuntu kernel: [ 1271.132192] usb 1-4: Sierra USB modem converter now attached to ttyUSB0 Jul 11 18:46:21 xubuntu kernel: [ 1271.132269] sierra 1-4:1.1: Sierra USB modem converter detected Jul 11 18:46:21 xubuntu kernel: [ 1271.132644] usb 1-4: Sierra USB modem converter now attached to ttyUSB1 Jul 11 18:46:21 xubuntu kernel: [ 1271.132710] sierra 1-4:1.3: Sierra USB modem converter detected Jul 11 18:46:21 xubuntu kernel: [ 1271.133019] usb 1-4: Sierra USB modem converter now attached to ttyUSB2 Jul 11 18:46:21 xubuntu kernel: [ 1271.133096] sierra 1-4:1.4: Sierra USB modem converter detected Jul 11 18:46:21 xubuntu kernel: [ 1271.133393] usb 1-4: Sierra USB modem converter now attached to ttyUSB3 Jul 11 18:46:21 xubuntu kernel: [ 1271.135013] sierra_net 1-4:1.7 wwan0: register 'sierra_net' at usb-0000:00:02.1-4, Sierra Wireless USB-to-WWAN Modem, 0e:04:e9:60:02:07 Jul 11 18:46:21 xubuntu mtp-probe: checking bus 1, device 5: "/sys/devices/pci0000:00/0000:00:02.1/usb1/1-4" Jul 11 18:46:21 xubuntu mtp-probe: bus: 1, device: 5 was not an MTP device Jul 11 18:46:21 xubuntu ModemManager[5083]: (ttyUSB2): port attributes not fully set Jul 11 18:46:21 xubuntu ModemManager[5083]: (ttyUSB1): port attributes not fully set Jul 11 18:46:21 xubuntu NetworkManager[2342]: SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.7/net/wwan0, iface: wwan0) Jul 11 18:46:21 xubuntu NetworkManager[2342]: SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.7/net/wwan0, iface: wwan0): no ifupdown configuration found. Jul 11 18:46:21 xubuntu ModemManager[5083]: (ttyUSB0): port attributes not fully set Jul 11 18:46:21 xubuntu ModemManager[5083]: (ttyUSB3): port attributes not fully set Jul 11 18:46:33 xubuntu ModemManager[5083]: Creating modem with plugin 'Sierra (legacy)' and '5' ports Jul 11 18:46:33 xubuntu ModemManager[5083]: Could not grab port (tty/ttyUSB0): 'Cannot add port 'tty/ttyUSB0', unhandled serial type' Jul 11 18:46:33 xubuntu ModemManager[5083]: Could not grab port (tty/ttyUSB1): 'Cannot add port 'tty/ttyUSB1', unhandled serial type' Jul 11 18:46:33 xubuntu ModemManager[5083]: (ttyUSB2): port attributes not fully set Jul 11 18:46:33 xubuntu ModemManager[5083]: Modem for device at '/sys/devices/pci0000:00/0000:00:02.1/usb1/1-4' successfully created Jul 11 18:46:37 xubuntu ModemManager[5083]: Modem: state changed (unknown -> disabled) Jul 11 18:46:37 xubuntu NetworkManager[2342]: (ttyUSB2): failed to look up interface index Jul 11 18:46:37 xubuntu NetworkManager[2342]: WWAN now disabled by management service Jul 11 18:46:37 xubuntu NetworkManager[2342]: (ttyUSB2): new Broadband device (driver: 'sierra, sierra_net' ifindex: 0) Jul 11 18:46:37 xubuntu NetworkManager[2342]: (ttyUSB2): exported as /org/freedesktop/NetworkManager/Devices/2 Jul 11 18:46:37 xubuntu NetworkManager[2342]: (ttyUSB2): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Jul 11 18:46:37 xubuntu NetworkManager[2342]: (ttyUSB2): deactivating device (reason 'managed') [2] Jul 11 18:46:37 xubuntu NetworkManager[2342]: NetworkManager state is now DISCONNECTED Jul 11 18:46:37 xubuntu NetworkManager[2342]: (ttyUSB2): device state change: unavailable -> disconnected (reason 'none') [20 30 0] ...................................................... now checking: xubuntu@xubuntu:~/Desktop$ ls /dev/ttyUSB* /dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2 /dev/ttyUSB3 xubuntu@xubuntu:~/Desktop$ mmcli -L Found 1 modems: /org/freedesktop/ModemManager1/Modem/0 [Sierra Wireless, Incorporated] AC318U xubuntu@xubuntu:~/Desktop$ mmcli -m 0 /org/freedesktop/ModemManager1/Modem/0 (device id '1ac66068f30ff6ed7cb58459eba4b18bd13a1405') ------------------------- Hardware | manufacturer: 'Sierra Wireless, Incorporated' | model: 'AC318U' | revision: 'T1_0_3_2AP R361 CKPRXD00000031 2011/04/15 17:40:48' | supported: 'gsm-umts' | current: 'gsm-umts' | equipment id: '111111111111111' ------------------------- System | device: '/sys/devices/pci0000:00/0000:00:02.1/usb1/1-4' | drivers: 'sierra, sierra_net' | plugin: 'Sierra (legacy)' | primary port: 'ttyUSB2' | ports: 'ttyUSB2 (at), ttyUSB3 (at), wwan0 (net)' ------------------------- Numbers | own : '+00000000000' [ My comment: phone number correctly recognized ] etc.... Under the "Mobile broadband" is still visible my profile 'T-mobile Default' so I click on it again... Jul 11 18:54:33 xubuntu NetworkManager[2342]: Activation (ttyUSB2) starting connection 'T-mobile Default' Jul 11 18:54:33 xubuntu NetworkManager[2342]: (ttyUSB2): device state change: disconnected -> prepare (reason 'none') [30 40 0] Jul 11 18:54:33 xubuntu NetworkManager[2342]: NetworkManager state is now CONNECTING Jul 11 18:54:33 xubuntu NetworkManager[2342]: Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) scheduled... Jul 11 18:54:33 xubuntu NetworkManager[2342]: Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) started... Jul 11 18:54:33 xubuntu NetworkManager[2342]: Activation (ttyUSB2) Stage 1 of 5 (Device Prepare) complete. Jul 11 18:54:33 xubuntu ModemManager[5083]: Simple connect started... Jul 11 18:54:33 xubuntu ModemManager[5083]: Simple connect state (3/8): Enable Jul 11 18:54:33 xubuntu ModemManager[5083]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (disabled -> enabling) Jul 11 18:54:33 xubuntu NetworkManager[2342]: (ttyUSB2) modem state changed, 'disabled' --> 'enabling' (reason: user-requested) Jul 11 18:54:33 xubuntu ModemManager[5083]: (ttyUSB2): port attributes not fully set Jul 11 18:54:33 xubuntu ModemManager[5083]: (ttyUSB3): port attributes not fully set Jul 11 18:54:34 xubuntu ModemManager[5083]: Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state changed (unknown -> registering) Jul 11 18:54:34 xubuntu ModemManager[5083]: Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state changed (registering -> home) Jul 11 18:54:34 xubuntu ModemManager[5083]: Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP location updated (MCC: '0', MNC: '0', Location area code: 'DFDE', Cell ID: '2BEAC7D') Jul 11 18:54:34 xubuntu ModemManager[5083]: Modem /org/freedesktop/ModemManager1/Modem/0: 3GPP location updated (MCC: '260', MNC: '2', Location area code: 'DFDE', Cell ID: '2BEAC7D') Jul 11 18:54:35 xubuntu kernel: [ 1765.263698] usb 1-4: USB disconnect, device number 5 Jul 11 18:54:35 xubuntu kernel: [ 1765.263875] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0 Jul 11 18:54:35 xubuntu kernel: [ 1765.263894] sierra 1-4:1.0: device disconnected Jul 11 18:54:35 xubuntu ModemManager[5083]: (tty/ttyUSB0): released by modem /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4 Jul 11 18:54:35 xubuntu kernel: [ 1765.264165] sierra ttyUSB1: Sierra USB modem converter now disconnected from ttyUSB1 Jul 11 18:54:35 xubuntu kernel: [ 1765.264176] sierra 1-4:1.1: device disconnected Jul 11 18:54:35 xubuntu kernel: [ 1765.266915] sierra ttyUSB2: Sierra USB modem converter now disconnected from ttyUSB2 Jul 11 18:54:35 xubuntu kernel: [ 1765.266927] sierra 1-4:1.3: device disconnected Jul 11 18:54:35 xubuntu kernel: [ 1765.268612] ModemManager[5083]: segfault at 28 ip 00000000004328f0 sp 00007ffcd46b59a8 error 4 in ModemManager[400000+df000] Jul 11 18:54:35 xubuntu ModemManager[5083]: mm_serial_port_close: assertion 'priv->open_count > 0' failed Jul 11 18:54:35 xubuntu ModemManager[5083]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (enabling -> registered) Jul 11 18:54:35 xubuntu ModemManager[5083]: Simple connect state (4/8): Wait to get fully enabled Jul 11 18:54:35 xubuntu ModemManager[5083]: Simple connect state (5/8): Register Jul 11 18:54:35 xubuntu ModemManager[5083]: Simple connect state (6/8): Bearer Jul 11 18:54:35 xubuntu NetworkManager[2342]: (ttyUSB2) modem state changed, 'enabling' --> 'registered' (reason: user-requested) Jul 11 18:54:35 xubuntu NetworkManager[2342]: WWAN now enabled by management service Jul 11 18:54:35 xubuntu kernel: [ 1765.269539] sierra ttyUSB3: Sierra USB modem converter now disconnected from ttyUSB3 Jul 11 18:54:35 xubuntu kernel: [ 1765.269551] sierra 1-4:1.4: device disconnected Jul 11 18:54:35 xubuntu kernel: [ 1765.271899] sierra_net 1-4:1.7 wwan0: unregister 'sierra_net' usb-0000:00:02.1-4, Sierra Wireless USB-to-WWAN Modem Jul 11 18:54:35 xubuntu NetworkManager[2342]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.7/net/wwan0, iface: wwan0) Jul 11 18:54:35 xubuntu kernel: [ 1765.306793] sierra_net 1-4:1.7 wwan0 (unregistered): usb_control_msg failed, status -19 Jul 11 18:54:36 xubuntu kernel: [ 1765.527589] init: modemmanager main process (5083) killed by SEGV signal Jul 11 18:54:36 xubuntu kernel: [ 1765.527606] init: modemmanager main process ended, respawning Jul 11 18:54:36 xubuntu NetworkManager[2342]: ModemManager disappeared from bus Jul 11 18:54:36 xubuntu NetworkManager[2342]: (ttyUSB2): device state change: prepare -> unmanaged (reason 'removed') [40 10 36] Jul 11 18:54:36 xubuntu NetworkManager[2342]: (ttyUSB2): deactivating device (reason 'removed') [36] Jul 11 18:54:36 xubuntu NetworkManager[2342]: (ttyUSB2): cleaning up... Jul 11 18:54:36 xubuntu NetworkManager[2342]: (ttyUSB2): taking down device. Jul 11 18:54:36 xubuntu ModemManager[5175]: ModemManager (version 1.0.0) starting... Jul 11 18:54:36 xubuntu NetworkManager[2342]: Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889) Jul 11 18:54:36 xubuntu NetworkManager[2342]: Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889) Jul 11 18:54:36 xubuntu NetworkManager[2342]: NetworkManager state is now CONNECTED_GLOBAL Jul 11 18:54:36 xubuntu NetworkManager[2342]: Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889) Jul 11 18:54:36 xubuntu NetworkManager[2342]: (ttyUSB2) failed to connect modem: Message did not receive a reply (timeout by message bus) Jul 11 18:54:36 xubuntu NetworkManager[2342]: nm_device_get_state: assertion 'NM_IS_DEVICE (device)' failed Jul 11 18:54:36 xubuntu NetworkManager[2342]: modem_prepare_result: assertion 'state == NM_DEVICE_STATE_PREPARE' failed Jul 11 18:54:36 xubuntu NetworkManager[2342]: ModemManager disappeared from bus Jul 11 18:54:36 xubuntu NetworkManager[2342]: (ttyUSB2) failed to disconnect modem: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name :1.76 was not provided by any .service files Jul 11 18:54:36 xubuntu NetworkManager[2342]: ModemManager available in the bus Jul 11 18:54:38 xubuntu ModemManager[5175]: Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:0a.0': not supported by any plugin Jul 11 18:54:39 xubuntu kernel: [ 1769.108029] usb 1-4: new high-speed USB device number 6 using ehci-pci Jul 11 18:54:39 xubuntu kernel: [ 1769.241475] usb 1-4: config 1 has an invalid interface number: 7 but max is 4 Jul 11 18:54:39 xubuntu kernel: [ 1769.241478] usb 1-4: config 1 has no interface number 2 Jul 11 18:54:39 xubuntu kernel: [ 1769.242970] usb 1-4: New USB device found, idVendor=1199, idProduct=68a3 Jul 11 18:54:39 xubuntu kernel: [ 1769.242973] usb 1-4: New USB device strings: Mfr=3, Product=2, SerialNumber=4 Jul 11 18:54:39 xubuntu kernel: [ 1769.242975] usb 1-4: Product: AC318U Jul 11 18:54:39 xubuntu kernel: [ 1769.242977] usb 1-4: Manufacturer: Sierra Wireless, Incorporated Jul 11 18:54:39 xubuntu kernel: [ 1769.242979] usb 1-4: SerialNumber: 111111111111111 Jul 11 18:54:39 xubuntu kernel: [ 1769.246046] sierra 1-4:1.0: Sierra USB modem converter detected Jul 11 18:54:39 xubuntu kernel: [ 1769.248338] usb 1-4: Sierra USB modem converter now attached to ttyUSB0 Jul 11 18:54:39 xubuntu kernel: [ 1769.248410] sierra 1-4:1.1: Sierra USB modem converter detected Jul 11 18:54:39 xubuntu kernel: [ 1769.248795] usb 1-4: Sierra USB modem converter now attached to ttyUSB1 Jul 11 18:54:39 xubuntu kernel: [ 1769.248860] sierra 1-4:1.3: Sierra USB modem converter detected Jul 11 18:54:39 xubuntu kernel: [ 1769.249161] usb 1-4: Sierra USB modem converter now attached to ttyUSB2 Jul 11 18:54:39 xubuntu kernel: [ 1769.249238] sierra 1-4:1.4: Sierra USB modem converter detected Jul 11 18:54:39 xubuntu kernel: [ 1769.249536] usb 1-4: Sierra USB modem converter now attached to ttyUSB3 Jul 11 18:54:39 xubuntu kernel: [ 1769.251155] sierra_net 1-4:1.7 wwan0: register 'sierra_net' at usb-0000:00:02.1-4, Sierra Wireless USB-to-WWAN Modem, 0e:04:e9:60:03:07 Jul 11 18:54:39 xubuntu mtp-probe: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:02.1/usb1/1-4" Jul 11 18:54:39 xubuntu mtp-probe: bus: 1, device: 6 was not an MTP device Jul 11 18:54:39 xubuntu NetworkManager[2342]: SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.7/net/wwan0, iface: wwan0) Jul 11 18:54:39 xubuntu NetworkManager[2342]: SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.7/net/wwan0, iface: wwan0): no ifupdown configuration found. Jul 11 18:54:39 xubuntu ModemManager[5175]: (ttyUSB0): port attributes not fully set Jul 11 18:54:39 xubuntu ModemManager[5175]: (ttyUSB3): port attributes not fully set Jul 11 18:54:39 xubuntu ModemManager[5175]: (ttyUSB2): port attributes not fully set Jul 11 18:54:39 xubuntu ModemManager[5175]: (ttyUSB1): port attributes not fully set Jul 11 18:54:51 xubuntu ModemManager[5175]: Creating modem with plugin 'Sierra (legacy)' and '5' ports Jul 11 18:54:51 xubuntu ModemManager[5175]: Could not grab port (tty/ttyUSB1): 'Cannot add port 'tty/ttyUSB1', unhandled serial type' Jul 11 18:54:51 xubuntu ModemManager[5175]: Could not grab port (tty/ttyUSB0): 'Cannot add port 'tty/ttyUSB0', unhandled serial type' Jul 11 18:54:51 xubuntu ModemManager[5175]: (ttyUSB2): port attributes not fully set Jul 11 18:54:51 xubuntu ModemManager[5175]: Modem for device at '/sys/devices/pci0000:00/0000:00:02.1/usb1/1-4' successfully created now checking: xubuntu@xubuntu:~/Desktop$ ls /dev/ttyUSB* /dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2 /dev/ttyUSB3 no internet connection but the modem is still visible