With latest karmic, this is what I see with modem-manager and networkmanager in debug mode, and with usbserial modprobed with proper vendor and product IDs:

naveen@naveen-desktop:~$ sudo /usr/sbin/modem-manager --debug
** Message: Loaded plugin Option
** Message: Loaded plugin Huawei
** Message: Loaded plugin Generic
** Message: Loaded plugin Option High-Speed
** Message: Loaded plugin MotoC
** Message: Loaded plugin Sierra
** Message: Loaded plugin Novatel
** Message: Loaded plugin Gobi
** Message: Loaded plugin ZTE
** Message: Loaded plugin Nokia
** Message: Loaded plugin Ericsson MBM
** Message: (ttyUSB2) opening serial device...
** (modem-manager:4969): DEBUG: (ttyUSB2): probe requested by plugin 'ZTE'
** Message: (ttyUSB1) opening serial device...
** (modem-manager:4969): DEBUG: (ttyUSB1): probe requested by plugin 'ZTE'
** Message: (ttyUSB0) opening serial device...
** (modem-manager:4969): DEBUG: (ttyUSB0): probe requested by plugin 'ZTE'
** Message: (ttyUSB3) opening serial device...
** (modem-manager:4969): DEBUG: (ttyUSB3): probe requested by plugin 'ZTE'
** (modem-manager:4969): DEBUG: (ttyUSB2): --> 'AT+GCAP<CR>'
** (modem-manager:4969): DEBUG: (ttyUSB1): --> 'AT+GCAP<CR>'
** (modem-manager:4969): DEBUG: (ttyUSB0): --> 'AT+GCAP<CR>'
** (modem-manager:4969): DEBUG: (ttyUSB3): --> 'AT+GCAP<CR>'
** (modem-manager:4969): DEBUG: (ttyUSB0): <-- 'AT+GCAP<CR><CR><LF>+GCAP: +CIS707-A, CIS-856, +MS, +ES, +DS, +FCLASS<CR><LF><CR><LF>OK<CR><LF>'
** (modem-manager:4969): DEBUG: (ttyUSB2): --> 'AT+GCAP<CR>'
** Message: (ttyUSB0) closing serial device...
** (modem-manager:4969): DEBUG: (ttyUSB2): --> 'AT+GCAP<CR>'
** Message: (ZTE): CDMA modem /sys/devices/pci0000:00/0000:00:1d.3/usb5/5-1 claimed port ttyUSB0
** (modem-manager:4969): DEBUG: Added modem /sys/devices/pci0000:00/0000:00:1d.3/usb5/5-1
** (modem-manager:4969): DEBUG: Exported modem /sys/devices/pci0000:00/0000:00:1d.3/usb5/5-1 as /org/freedesktop/ModemManager/Modems/0
** (modem-manager:4969): DEBUG: (ttyUSB1): --> 'AT+GCAP<CR>'
** (modem-manager:4969): DEBUG: (ttyUSB3): --> 'AT+GCAP<CR>'
** (modem-manager:4969): DEBUG: (ttyUSB2): --> 'ATI<CR>'
** Message: (ttyUSB2) closing serial device...
** (modem-manager:4969): DEBUG: (ttyUSB1): --> 'AT+GCAP<CR>'
** (modem-manager:4969): DEBUG: (ttyUSB3): --> 'AT+GCAP<CR>'
** Message: (ttyUSB1) closing serial device...
** Message: (ttyUSB3) closing serial device...


The probing seems to last forever since modem-manager tries to probe ttyUSB[1-3] which don't respond. ttyUSB0 responds immediately as can be seen. It takes nearly 5 min for ttyUSB0 to be recognised as a CDMA modem and exported. NetworkManager still refuses to enlist this modem:

naveen@naveen-desktop:~$ sudo NetworkManager --no-daemon
NetworkManager: <info>  starting...
NetworkManager: <info>  modem-manager is now available
NetworkManager:    SCPlugin-Ifupdown: init!
NetworkManager:    SCPlugin-Ifupdown: update_system_hostname
NetworkManager:    SCPluginIfupdown: management mode: unmanaged
NetworkManager:    SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1e.0/0000:02:05.0/net/eth0, iface: eth0)
NetworkManager:    SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1e.0/0000:02:05.0/net/eth0, iface: eth0): no exported connection
NetworkManager:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/lo, iface: lo)
NetworkManager:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/lo, iface: lo): no exported connection
NetworkManager:    SCPlugin-Ifupdown: end _init.
NetworkManager: Loaded plugin ifupdown: (C) 2008 Canonical Ltd.  To report bugs please use the NetworkManager mailing list.
NetworkManager: Loaded plugin keyfile: (c) 2007 - 2008 Red Hat, Inc.  To report bugs please use the NetworkManager mailing list.
NetworkManager: <info>  Wireless now enabled by radio killswitch
NetworkManager:    SCPlugin-Ifupdown: (140234016) ... get_connections.
NetworkManager:    SCPlugin-Ifupdown: (140234016) ... get_connections (managed=false): return empty list.
NetworkManager:    Ifupdown: get unmanaged devices count: 0
NetworkManager: <info>  (eth0): new Ethernet device (driver: 'skge')
NetworkManager: <info>  (eth0): exported as /org/freedesktop/NetworkManager/Devices/0
NetworkManager: <info>  (eth0): now managed
NetworkManager: <info>  (eth0): device state change: 1 -> 2 (reason 2)
NetworkManager: <info>  (eth0): bringing up device.
NetworkManager: <info>  (eth0): preparing device.
NetworkManager: <info>  (eth0): deactivating device (reason: 2).
NetworkManager: Added default wired connection 'Auto eth0' for /sys/devices/pci0000:00/0000:00:1e.0/0000:02:05.0/net/eth0
NetworkManager: <WARN>  default_adapter_cb(): bluez error getting default adapter: The name org.bluez was not provided by any .service files
NetworkManager: Could not get device: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

Note the last message there - that seems to coincide with the cdma modem being exported by modem-manager.

So, two issues to resolve:
- modem-manager probing un-needed ports and timing out
- NetworkManager throwing an error that's not quiet useful to figure out whats happening.


- Naveen