from Debian 8.2, packages : ii linux-image-3.16.0-4-amd64 3.16.7-ckt11-1+deb8u6 amd64 Linux 3.16 for 64-bit PCs ii modemmanager 1.4.0-1 amd64 D-Bus service for managing modems ii network-manager 0.9.10.0-7 amd64 network management framework (daemon and userspace tools) logs: Dec 11 22:41:49 debian kernel: usb 1-2.2: new full-speed USB device number 6 using xhci_hcd Dec 11 22:41:49 debian kernel: usb 1-2.2: device descriptor read/64, error -32 Dec 11 22:41:49 debian kernel: usb 1-2.2: New USB device found, idVendor=16d8, idProduct=6008 Dec 11 22:41:49 debian kernel: usb 1-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Dec 11 22:41:49 debian kernel: usb 1-2.2: Product: CMOTECH CDMA Technologies Dec 11 22:41:49 debian kernel: usb 1-2.2: Manufacturer: CMOTECH CO., LTD. Dec 11 22:41:49 debian kernel: usb-storage 1-2.2:1.4: USB Mass Storage device detected Dec 11 22:41:49 debian kernel: scsi5 : usb-storage 1-2.2:1.4 Dec 11 22:41:49 debian kernel: scsi 5:0:0:0: CD-ROM CMOTECH Mass Storage 2.31 PQ: 0 ANSI: 6 Dec 11 22:41:49 debian kernel: scsi 5:0:0:0: Attached scsi generic sg2 type 5 Dec 11 22:41:49 debian kernel: sr0: scsi3-mmc drive: 85x/0x cdda Dec 11 22:41:49 debian kernel: cdrom: Uniform CD-ROM driver Revision: 3.20 Dec 11 22:41:49 debian kernel: sr 5:0:0:0: Attached scsi CD-ROM sr0 Dec 11 22:41:49 debian kernel: sr0: CDROM (ioctl) error, command: Xpwrite, Read disk info 51 00 00 00 00 00 00 00 02 00 Dec 11 22:41:49 debian kernel: sr: Sense Key : Hardware Error [current] Dec 11 22:41:49 debian kernel: sr: Add. Sense: No additional sense information Dec 11 22:41:50 debian mtp-probe[234]: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.2" Dec 11 22:41:50 debian mtp-probe[237]: checking bus 1, device 4: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5" Dec 11 22:41:50 debian mtp-probe[238]: checking bus 1, device 5: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-6" Dec 11 22:41:50 debian mtp-probe[233]: checking bus 1, device 2: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1" Dec 11 22:41:50 debian mtp-probe[233]: bus: 1, device: 2 was not an MTP device Dec 11 22:41:50 debian mtp-probe[237]: bus: 1, device: 4 was not an MTP device Dec 11 22:41:50 debian mtp-probe[238]: bus: 1, device: 5 was not an MTP device Dec 11 22:41:50 debian mtp-probe[234]: bus: 1, device: 6 was not an MTP device Dec 11 22:41:51 debian kernel: usbcore: registered new interface driver cdc_wdm Dec 11 22:41:51 debian kernel: qmi_wwan 1-2.2:1.0: cdc-wdm0: USB WDM device Dec 11 22:41:51 debian kernel: qmi_wwan 1-2.2:1.0 wwan0: register 'qmi_wwan' at usb-0000:00:14.0-2.2, WWAN/QMI device, be:1d:e8:35:e4:4f Dec 11 22:41:51 debian kernel: usbcore: registered new interface driver qmi_wwan Dec 11 22:41:51 debian kernel: usbcore: registered new interface driver usbserial Dec 11 22:41:51 debian kernel: usbcore: registered new interface driver usbserial_generic Dec 11 22:41:51 debian kernel: usbserial: USB Serial support registered for generic Dec 11 22:41:51 debian kernel: usbcore: registered new interface driver option Dec 11 22:41:51 debian kernel: usbserial: USB Serial support registered for GSM modem (1-port) Dec 11 22:41:51 debian kernel: option 1-2.2:1.1: GSM modem (1-port) converter detected Dec 11 22:41:51 debian kernel: usb 1-2.2: GSM modem (1-port) converter now attached to ttyUSB0 Dec 11 22:41:51 debian kernel: option 1-2.2:1.2: GSM modem (1-port) converter detected Dec 11 22:41:51 debian kernel: usb 1-2.2: GSM modem (1-port) converter now attached to ttyUSB1 Dec 11 22:41:51 debian kernel: option 1-2.2:1.3: GSM modem (1-port) converter detected Dec 11 22:41:51 debian kernel: usb 1-2.2: GSM modem (1-port) converter now attached to ttyUSB2 Dec 11 22:41:54 debian ModemManager[542]: ModemManager (version 1.4.0) starting in system bus... Dec 11 22:41:55 debian NetworkManager[545]: devices added (path: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.2/1-2.2:1.0/net/wwan0, iface: wwan0) Dec 11 22:41:55 debian NetworkManager[545]: device added (path: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.2/1-2.2:1.0/net/wwan0, iface: wwan0): no ifupdown configuration found. Dec 11 22:41:55 debian NetworkManager[545]: ModemManager disappeared from bus Dec 11 22:41:55 debian NetworkManager[545]: ModemManager available in the bus Dec 11 22:41:55 debian ModemManager[542]: (ttyUSB0): port attributes not fully set Dec 11 22:41:55 debian ModemManager[542]: (ttyUSB1): port attributes not fully set Dec 11 22:41:55 debian ModemManager[542]: (ttyUSB2): port attributes not fully set Dec 11 22:41:55 debian ModemManager[542]: [/dev/cdc-wdm0] Opening device with flags 'version-info, proxy'... Dec 11 22:41:55 debian ModemManager[542]: cannot connect to proxy: Could not connect: Connection refused Dec 11 22:41:55 debian ModemManager[542]: spawning new qmi-proxy (try 1)... Dec 11 22:41:55 debian ModemManager[542]: [/dev/cdc-wdm0] Checking version info (10 retries)... Dec 11 22:41:55 debian ModemManager[542]: [/dev/cdc-wdm0] QMI Device supports 4 services: Dec 11 22:41:55 debian ModemManager[542]: [/dev/cdc-wdm0] ctl (1.0) Dec 11 22:41:55 debian ModemManager[542]: [/dev/cdc-wdm0] wds (1.1) Dec 11 22:41:55 debian ModemManager[542]: [/dev/cdc-wdm0] dms (1.1) Dec 11 22:41:55 debian ModemManager[542]: [/dev/cdc-wdm0] nas (1.0) Dec 11 22:41:57 debian ModemManager[542]: Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.2/0000:02:00.0': not supported by any plugin Dec 11 22:41:57 debian ModemManager[542]: (ttyUSB0): port attributes not fully set Dec 11 22:41:59 debian ModemManager[542]: (ttyUSB0): port attributes not fully set Dec 11 22:42:14 debian ModemManager[542]: Creating modem with plugin 'Generic' and '5' ports Dec 11 22:42:14 debian ModemManager[542]: Could not grab port (tty/ttyUSB2): 'Cannot add port 'tty/ttyUSB2', unhandled serial type' Dec 11 22:42:14 debian ModemManager[542]: Modem for device at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.2' successfully created Dec 11 22:42:14 debian ModemManager[542]: [/dev/cdc-wdm0] Opening device with flags 'version-info, net-802-3, net-no-qos-header, proxy'... Dec 11 22:42:14 debian ModemManager[542]: [/dev/cdc-wdm0] Checking version info (10 retries)... Dec 11 22:42:14 debian ModemManager[542]: [/dev/cdc-wdm0] QMI Device supports 4 services: Dec 11 22:42:14 debian ModemManager[542]: [/dev/cdc-wdm0] ctl (1.0) Dec 11 22:42:14 debian ModemManager[542]: [/dev/cdc-wdm0] wds (1.1) Dec 11 22:42:14 debian ModemManager[542]: [/dev/cdc-wdm0] dms (1.1) Dec 11 22:42:14 debian ModemManager[542]: [/dev/cdc-wdm0] nas (1.0) Dec 11 22:42:14 debian ModemManager[542]: [/dev/cdc-wdm0] Setting network port data format... Dec 11 22:42:19 debian ModemManager[542]: [/dev/cdc-wdm0] Opening device with flags 'version-info, proxy'... Dec 11 22:42:19 debian ModemManager[542]: [/dev/cdc-wdm0] Checking version info (10 retries)... Dec 11 22:42:19 debian ModemManager[542]: [/dev/cdc-wdm0] QMI Device supports 4 services: Dec 11 22:42:19 debian ModemManager[542]: [/dev/cdc-wdm0] ctl (1.0) Dec 11 22:42:19 debian ModemManager[542]: [/dev/cdc-wdm0] wds (1.1) Dec 11 22:42:19 debian ModemManager[542]: [/dev/cdc-wdm0] dms (1.1) Dec 11 22:42:19 debian ModemManager[542]: [/dev/cdc-wdm0] nas (1.0) Dec 11 22:42:23 debian ModemManager[542]: [/dev/cdc-wdm0] Allocating new client ID... Dec 11 22:42:23 debian ModemManager[542]: [/dev/cdc-wdm0] Registered 'dms' (version 1.1) client with ID '2' Dec 11 22:42:25 debian ModemManager[542]: [/dev/cdc-wdm0] Allocating new client ID... Dec 11 22:42:25 debian ModemManager[542]: [/dev/cdc-wdm0] Registered 'nas' (version 1.0) client with ID '2' Dec 11 22:42:25 debian ModemManager[542]: (ttyUSB0): port attributes not fully set Dec 11 22:42:30 debian ModemManager[542]: couldn't load Supported Bands: 'QMI operation failed: Cannot send message: QMI service 'dms' version '1.3' required, got version '1.1'' Dec 11 22:42:35 debian ModemManager[542]: couldn't load Power State: 'QMI operation failed: Transaction timed out' Dec 11 22:42:35 debian ModemManager[542]: Couldn't load unlock retries: 'Couldn't get unlock retries: QMI protocol error (25): 'DeviceUnsupported'' Dec 11 22:42:40 debian ModemManager[542]: couldn't load current allowed/preferred modes: 'Loading current modes is not supported by this device' Dec 11 22:42:41 debian ModemManager[542]: couldn't load current Bands: 'QMI operation failed: Cannot send message: QMI service 'nas' version '1.1' required, got version '1.0'' Dec 11 22:42:41 debian ModemManager[542]: couldn't load MEID: 'Device doesn't report a valid MEID' Dec 11 22:42:41 debian ModemManager[542]: couldn't load activation state: 'QMI operation failed: Cannot send message: QMI service 'dms' version '1.3' required, got version '1.1'' Dec 11 22:42:41 debian ModemManager[542]: Modem: state changed (unknown -> disabled) Dec 11 22:42:41 debian NetworkManager[545]: (cdc-wdm0): failed to look up interface index Dec 11 22:42:41 debian NetworkManager[545]: (cdc-wdm0): modem state changed, 'disabled' --> 'enabling' (reason: user preference) Dec 11 22:42:41 debian NetworkManager[545]: (cdc-wdm0): new Broadband device (driver: 'option1, qmi_wwan' ifindex: 0) Dec 11 22:42:41 debian NetworkManager[545]: (cdc-wdm0): exported as /org/freedesktop/NetworkManager/Devices/2 Dec 11 22:42:41 debian NetworkManager[545]: (cdc-wdm0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Dec 11 22:42:41 debian NetworkManager[545]: (cdc-wdm0): preparing device Dec 11 22:42:41 debian NetworkManager[545]: (cdc-wdm0): modem state 'enabling' Dec 11 22:42:41 debian NetworkManager[545]: (cdc-wdm0): device state change: unavailable -> disconnected (reason 'none') [20 30 0] Dec 11 22:42:43 debian ModemManager[542]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (disabled -> enabling) Dec 11 22:42:43 debian ModemManager[542]: (ttyUSB0): port attributes not fully set Dec 11 22:42:48 debian ModemManager[542]: Couldn't reload current power state: QMI operation failed: Transaction timed out Dec 11 22:43:06 debian NetworkManager[545]: (cdc-wdm0) failed to enable modem: Час очікування вичерпано Dec 11 22:43:08 debian ModemManager[542]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (enabling -> disabled) Dec 11 22:43:08 debian NetworkManager[545]: (cdc-wdm0): modem state changed, 'enabling' --> 'disabled' (reason: unknown) Dec 11 22:47:21 debian NetworkManager[545]: Auto-activating connection 'InterTelecom'. Dec 11 22:47:21 debian NetworkManager[545]: Activation (cdc-wdm0) starting connection 'InterTelecom' Dec 11 22:47:21 debian NetworkManager[545]: Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) scheduled... Dec 11 22:47:21 debian NetworkManager[545]: Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) started... Dec 11 22:47:21 debian NetworkManager[545]: (cdc-wdm0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Dec 11 22:47:21 debian NetworkManager[545]: NetworkManager state is now CONNECTING Dec 11 22:47:21 debian ModemManager[542]: Simple connect started... Dec 11 22:47:21 debian ModemManager[542]: Simple connect state (3/8): Enable Dec 11 22:47:21 debian ModemManager[542]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (disabled -> enabling) Dec 11 22:47:21 debian NetworkManager[545]: Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) complete. Dec 11 22:47:21 debian NetworkManager[545]: (cdc-wdm0): modem state changed, 'disabled' --> 'enabling' (reason: user-requested) Dec 11 22:47:26 debian ModemManager[542]: Couldn't reload current power state: QMI operation failed: Transaction timed out Dec 11 22:47:26 debian anacron[539]: Job `cron.daily' terminated Dec 11 22:47:46 debian ModemManager[542]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (enabling -> disabled) Dec 11 22:47:46 debian NetworkManager[545]: (cdc-wdm0): modem state changed, 'enabling' --> 'disabled' (reason: unknown) Dec 11 22:47:46 debian NetworkManager[545]: (cdc-wdm0): device state change: prepare -> disconnected (reason 'user-requested') [40 30 39] Dec 11 22:47:46 debian NetworkManager[545]: (cdc-wdm0): deactivating device (reason 'user-requested') [39] Dec 11 22:47:46 debian NetworkManager[545]: NetworkManager state is now DISCONNECTED Dec 11 22:47:46 debian NetworkManager[545]: (cdc-wdm0) failed to connect modem: QMI operation failed: Transaction timed out Dec 11 22:47:46 debian NetworkManager[545]: Auto-activating connection 'InterTelecom'. Dec 11 22:47:46 debian NetworkManager[545]: Activation (cdc-wdm0) starting connection 'InterTelecom' Dec 11 22:47:46 debian NetworkManager[545]: Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) scheduled... Dec 11 22:47:46 debian NetworkManager[545]: Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) started... Dec 11 22:47:46 debian NetworkManager[545]: (cdc-wdm0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Dec 11 22:47:46 debian NetworkManager[545]: NetworkManager state is now CONNECTING Dec 11 22:47:46 debian NetworkManager[545]: Activation (cdc-wdm0) Stage 1 of 5 (Device Prepare) complete. Dec 11 22:47:46 debian NetworkManager[545]: (NetworkManager:545): NetworkManager-wwan-CRITICAL **: modem_prepare_result: assertion 'state == NM_DEVICE_STATE_PREPARE' failed Dec 11 22:47:46 debian ModemManager[542]: Simple connect started... Dec 11 22:47:46 debian ModemManager[542]: Simple connect state (3/8): Enable Dec 11 22:47:46 debian ModemManager[542]: Modem /org/freedesktop/ModemManager1/Modem/0: state changed (disabled -> enabling) Dec 11 22:47:46 debian NetworkManager[545]: (cdc-wdm0): modem state changed, 'disabled' --> 'enabling' (reason: user-requested) Dec 11 22:47:51 debian ModemManager[542]: Couldn't reload current power state: QMI operation failed: Transaction timed out ... and so on. I see that ModemManager is equally unable to initialize the modem. NetworkManager acts differently most probably because of version difference. Next I will try to run this mode with older Ubuntus, like 12.04