ModemManager fails to connect using F5521gw

[Johannes Sjölund]

Using ModemManager and NetworkManager git version both from 2011-11-23. Distribution is Arch Linux.

When trying to start a connection to mobile broadband provider Telia (Sweden), a popup message from NetworManager shows "The network connection has been disconnected". Two unkown errors are shown in ModemManager's debug log:

modem-manager[25675]: <info> [1322069289.371795] [mm-modem.c:744] mm_modem_set_state(): Modem /org/freedesktop/ModemManager/Modems/0: state changed (disabled -> enabling)
modem-manager[25675]: <debug> [1322069289.371941] [mm-at-serial-port.c:298] debug_log(): (ttyACM0): --> 'AT&F E0 V1 X4 &C1 +CMEE=1<CR>'
modem-manager[25675]: <debug> [1322069289.397784] [mm-at-serial-port.c:298] debug_log(): (ttyACM0): <-- 'AT&F <CR><LF>*EMRDY: 1<CR><LF>E0 V1 X4 &C1 +CMEE=1'
modem-manager[25675]: <debug> [1322069289.398397] [mm-at-serial-port.c:298] debug_log(): (ttyACM0): <-- '<CR>'
modem-manager[25675]: <debug> [1322069289.402565] [mm-at-serial-port.c:298] debug_log(): (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
modem-manager[25675]: <debug> [1322069289.402719] [mm-at-serial-port.c:298] debug_log(): (ttyACM0): --> 'AT*ENAP=0<CR>'
modem-manager[25675]: <debug> [1322069289.417310] [mm-at-serial-port.c:298] debug_log(): (ttyACM0): <-- '<CR><LF>+CME ERROR: 276<CR><LF>'
modem-manager[25675]: Invalid error code: 276
modem-manager[25675]: <debug> [1322069289.417490] [mm-serial-parsers.c:410] mm_serial_parser_v1_parse(): Got failure code 100: Unknown error
modem-manager[25675]: <debug> [1322069289.417675] [mm-at-serial-port.c:298] debug_log(): (ttyACM0): --> 'AT+CFUN=1<CR>'
modem-manager[25675]: <debug> [1322069289.440664] [mm-at-serial-port.c:298] debug_log(): (ttyACM0): <-- '<CR><LF>+CME ERROR: 272<CR><LF>'
modem-manager[25675]: Invalid error code: 272
modem-manager[25675]: <debug> [1322069289.440840] [mm-serial-parsers.c:410] mm_serial_parser_v1_parse(): Got failure code 100: Unknown error

See attached log for more.

I am not sure what info I should provide so please ask if you need more. I will attach log from NetworkManager too.

[Johannes Sjölund (j-sjolund)]

I have been informed this is not the official place to report bugs about ModemManager. Since the report doesn't have anything to do with Ubuntu, I would remove this bug report if I could.

For anyone finding this bug, I found a partial solution to the problem. After I did a factory reset of the BIOS the modem started working again.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.