Comment 30 for bug 425312

I have similar issue, but my card is usually not shown in nm-applet also when card was inserted before boot (rarely it is shown, but connection fails always). Making connection with pppd from command line works without any problems (with the help of comgt utility to register the card with PIN before) so this is hard to belive that the problem could be coused by some nozomi bug as GrEdi suggested before.

One interesting thing is in syslog after inserting the card - modem-manager entries probing for /dev/nozomi appear first and kernel nozomi driver entries saying that device is ready appear later:

Dec 22 20:20:23 lap modem-manager: (noz0) opening serial device...
Dec 22 20:20:23 lap modem-manager: (noz3) opening serial device...
Dec 22 20:20:23 lap modem-manager: (noz1) opening serial device...
Dec 22 20:20:23 lap modem-manager: (noz2) opening serial device...
Dec 22 20:20:23 lap kernel: [ 1102.992174] nozomi 0000:16:00.2: Version of card: 3
Dec 22 20:20:23 lap kernel: [ 1102.992401] nozomi 0000:16:00.2: Initialization OK!
Dec 22 20:20:24 lap kernel: [ 1103.571538] nozomi 0000:16:00.2: Device READY!
Dec 22 20:21:27 lap modem-manager: Caught signal 15, shutting down...

It seems that modem-manager tries to access nozomi device when the device is not ready yet.

A workaround is to download and compile comgt utility, make proper configuration with pppconfig and than use comgt for registering the card and pon and poff commands to connect to internet.