Okay, here is what I got from the debug:

modem-manager[2887]: <info>  [1351082877.649683] [main.c:167] main(): ModemManager (version 0.6.0.0) starting...
modem-manager[2887]: <info>  [1351082877.658050] [mm-manager.c:158] found_plugin(): Loaded plugin 'Huawei'
modem-manager[2887]: <info>  [1351082877.658128] [mm-manager.c:158] found_plugin(): Loaded plugin 'Sierra'
modem-manager[2887]: <info>  [1351082877.658149] [mm-manager.c:158] found_plugin(): Loaded plugin 'Option'
modem-manager[2887]: <info>  [1351082877.658168] [mm-manager.c:158] found_plugin(): Loaded plugin 'X22X'
modem-manager[2887]: <info>  [1351082877.658185] [mm-manager.c:158] found_plugin(): Loaded plugin 'SimTech'
modem-manager[2887]: <info>  [1351082877.658202] [mm-manager.c:158] found_plugin(): Loaded plugin 'Wavecom'
modem-manager[2887]: <info>  [1351082877.658219] [mm-manager.c:158] found_plugin(): Loaded plugin 'Ericsson MBM'
modem-manager[2887]: <info>  [1351082877.658237] [mm-manager.c:158] found_plugin(): Loaded plugin 'Nokia'
modem-manager[2887]: <info>  [1351082877.658256] [mm-manager.c:158] found_plugin(): Loaded plugin 'Linktop'
modem-manager[2887]: <info>  [1351082877.658274] [mm-manager.c:158] found_plugin(): Loaded plugin 'Gobi'
modem-manager[2887]: <info>  [1351082877.658291] [mm-manager.c:158] found_plugin(): Loaded plugin 'Longcheer'
modem-manager[2887]: <info>  [1351082877.658308] [mm-manager.c:158] found_plugin(): Loaded plugin 'AnyData'
modem-manager[2887]: <info>  [1351082877.658326] [mm-manager.c:158] found_plugin(): Loaded plugin 'Samsung'
modem-manager[2887]: <info>  [1351082877.658344] [mm-manager.c:158] found_plugin(): Loaded plugin 'Option High-Speed'
modem-manager[2887]: <info>  [1351082877.658362] [mm-manager.c:158] found_plugin(): Loaded plugin 'MotoC'
modem-manager[2887]: <info>  [1351082877.658379] [mm-manager.c:158] found_plugin(): Loaded plugin 'ZTE'
modem-manager[2887]: <info>  [1351082877.658396] [mm-manager.c:158] found_plugin(): Loaded plugin 'Novatel'
modem-manager[2887]: <info>  [1351082877.658415] [mm-manager.c:158] found_plugin(): Loaded plugin 'Iridium'
modem-manager[2887]: <info>  [1351082877.658432] [mm-manager.c:158] found_plugin(): Loaded plugin 'Cinterion'
modem-manager[2887]: <info>  [1351082877.658450] [mm-manager.c:158] found_plugin(): Loaded plugin 'Generic'
modem-manager[2887]: <info>  [1351082877.658469] [mm-manager.c:210] load_plugins(): Successfully loaded 20 plugins
modem-manager[2887]: <debug> [1351082877.658805] [mm-manager.c:1057] mm_manager_start(): Starting device scan...
modem-manager[2887]: <debug> [1351082877.661379] [mm-manager.c:875] device_added(): (tty/ttyS0): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.661600] [mm-manager.c:875] device_added(): (tty/ttyS1): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.661804] [mm-manager.c:875] device_added(): (tty/ttyS10): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.661951] [mm-manager.c:875] device_added(): (tty/ttyS11): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.662195] [mm-manager.c:875] device_added(): (tty/ttyS12): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.662339] [mm-manager.c:875] device_added(): (tty/ttyS13): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.662564] [mm-manager.c:875] device_added(): (tty/ttyS14): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.662731] [mm-manager.c:875] device_added(): (tty/ttyS15): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.662875] [mm-manager.c:875] device_added(): (tty/ttyS16): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.663048] [mm-manager.c:875] device_added(): (tty/ttyS17): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.663216] [mm-manager.c:875] device_added(): (tty/ttyS18): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.663390] [mm-manager.c:875] device_added(): (tty/ttyS19): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.663579] [mm-manager.c:875] device_added(): (tty/ttyS2): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.663746] [mm-manager.c:875] device_added(): (tty/ttyS20): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.663886] [mm-manager.c:875] device_added(): (tty/ttyS21): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.664028] [mm-manager.c:875] device_added(): (tty/ttyS22): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.664169] [mm-manager.c:875] device_added(): (tty/ttyS23): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.664305] [mm-manager.c:875] device_added(): (tty/ttyS24): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.664447] [mm-manager.c:875] device_added(): (tty/ttyS25): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.664590] [mm-manager.c:875] device_added(): (tty/ttyS26): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.664731] [mm-manager.c:875] device_added(): (tty/ttyS27): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.664867] [mm-manager.c:875] device_added(): (tty/ttyS28): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.665003] [mm-manager.c:875] device_added(): (tty/ttyS29): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.665141] [mm-manager.c:875] device_added(): (tty/ttyS3): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.665280] [mm-manager.c:875] device_added(): (tty/ttyS30): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.665418] [mm-manager.c:875] device_added(): (tty/ttyS31): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.665553] [mm-manager.c:875] device_added(): (tty/ttyS4): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.665689] [mm-manager.c:875] device_added(): (tty/ttyS5): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.665826] [mm-manager.c:875] device_added(): (tty/ttyS6): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.665961] [mm-manager.c:875] device_added(): (tty/ttyS7): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.666096] [mm-manager.c:875] device_added(): (tty/ttyS8): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.666235] [mm-manager.c:875] device_added(): (tty/ttyS9): port's parent platform driver is not whitelisted
modem-manager[2887]: <debug> [1351082877.667105] [mm-manager.c:859] device_added(): (tty/ttyprintk): could not get port's parent device
modem-manager[2887]: <debug> [1351082877.671175] [mm-manager.c:1075] mm_manager_start(): Finished device scan...