Comment 19 for bug 456612

I think I have the same issue - it began to happen after upgrading to 9.10. My CDMA module is called 'Telit'. Works with cdc_acm

Nov 2 10:14:24 iaaron-acerone kernel: [ 1412.216139] usb 3-1: new full speed USB device using uhci_hcd and address 3
Nov 2 10:14:24 iaaron-acerone kernel: [ 1412.434457] usb 3-1: configuration #1 chosen from 1 choice
Nov 2 10:14:24 iaaron-acerone kernel: [ 1412.437392] cdc_acm 3-1:1.0: ttyACM0: USB ACM device
Nov 2 10:14:24 iaaron-acerone kernel: [ 1412.442459] cdc_acm 3-1:1.2: ttyACM1: USB ACM device
Nov 2 10:14:24 iaaron-acerone kernel: [ 1412.447977] cdc_acm 3-1:1.4: ttyACM2: USB ACM device
Nov 2 10:14:24 iaaron-acerone modem-manager: (ttyACM2) opening serial device...
Nov 2 10:14:24 iaaron-acerone modem-manager: (ttyACM2): probe requested by plugin 'Generic'
Nov 2 10:14:24 iaaron-acerone modem-manager: (ttyACM0) opening serial device...
Nov 2 10:14:24 iaaron-acerone modem-manager: (ttyACM0): probe requested by plugin 'Generic'
Nov 2 10:14:24 iaaron-acerone modem-manager: (ttyACM1) opening serial device...
Nov 2 10:14:24 iaaron-acerone modem-manager: (ttyACM1): probe requested by plugin 'Generic'
Nov 2 10:14:27 iaaron-acerone modem-manager: Got failure code 100: Unknown error
Nov 2 10:14:27 iaaron-acerone modem-manager: (ttyACM0) closing serial device...
Nov 2 10:14:28 iaaron-acerone modem-manager: Got failure code 100: Unknown error
Nov 2 10:14:28 iaaron-acerone modem-manager: (Generic): CDMA modem /sys/devices/pci0000:00/0000:00:1d.1/usb3/3-1 claimed port ttyACM0
Nov 2 10:14:28 iaaron-acerone modem-manager: Added modem /sys/devices/pci0000:00/0000:00:1d.1/usb3/3-1
Nov 2 10:14:28 iaaron-acerone modem-manager: Exported modem /sys/devices/pci0000:00/0000:00:1d.1/usb3/3-1 as /org/freedesktop/ModemManager/Modems/1
Nov 2 10:14:28 iaaron-acerone modem-manager: Got failure code 100: Unknown error
Nov 2 10:14:30 iaaron-acerone modem-manager: Got failure code 100: Unknown error
Nov 2 10:14:30 iaaron-acerone modem-manager: (ttyACM1) closing serial device...
Nov 2 10:14:30 iaaron-acerone NetworkManager: <info> (ttyACM0): new CDMA device (driver: 'cdc_acm')
Nov 2 10:14:30 iaaron-acerone NetworkManager: <info> (ttyACM0): exported as /org/freedesktop/NetworkManager/Devices/3
Nov 2 10:14:30 iaaron-acerone NetworkManager: <info> (ttyACM0): now managed
Nov 2 10:14:30 iaaron-acerone NetworkManager: <info> (ttyACM0): device state change: 1 -> 2 (reason 2)
Nov 2 10:14:30 iaaron-acerone NetworkManager: <info> (ttyACM0): deactivating device (reason: 2).
Nov 2 10:14:30 iaaron-acerone NetworkManager: flush_routes: assertion `iface_idx >= 0' failed
Nov 2 10:14:30 iaaron-acerone NetworkManager: flush_addresses: assertion `iface_idx >= 0' failed
Nov 2 10:14:30 iaaron-acerone NetworkManager: <info> (ttyACM0): device state change: 2 -> 3 (reason 0)
Nov 2 10:14:36 iaaron-acerone modem-manager: (ttyACM2) closing serial device...