I have a E372 USB modem.
I am setting up 3G connectivity with modemmanager.
I believe I have everything regarding mode-switch set-up properly.
I do however experience some difficulty loading the wdm drivers.
It seems that on approximately every other boot the modem will appear as a cdc-wdm device or else a generic modem device.
If it loads the wdm driver properly I can indeed set-up a wdm connection and get that going. And if it appears simply as ttyUSB2 I can set-up a conventional ppp connection and get that going.
I am however puzzled by the seemingly randomness in whether the wdm driver get loaded properly or not.
Here's my dmesg output from when it appears as a "generic" modem:
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[ 15.595564] sd 3:0:0:0: [sda] Attached SCSI removable disk
[ 16.466843] usbcore: registered new interface driver cdc_wdm
[ 16.471369] usbcore: registered new interface driver usbserial
[ 16.471479] usbcore: registered new interface driver usbserial_generic
[ 16.471554] usbserial: USB Serial support registered for generic
[ 16.697792] usbcore: registered new interface driver option
[ 16.697920] usbserial: USB Serial support registered for GSM modem (1-port)
[ 16.698512] option 1-1.4:1.0: GSM modem (1-port) converter detected
[ 16.699889] usb 1-1.4: GSM modem (1-port) converter now attached to ttyUSB0
[ 16.700199] option 1-1.4:1.3: GSM modem (1-port) converter detected
[ 16.700974] usb 1-1.4: GSM modem (1-port) converter now attached to ttyUSB1
[ 16.701072] option 1-1.4:1.4: GSM modem (1-port) converter detected
[ 16.701606] usb 1-1.4: GSM modem (1-port) converter now attached to ttyUSB2
[ 16.710833] option 1-1.4:1.1: GSM modem (1-port) converter detected
[ 16.711794] option 1-1.4:1.2: GSM modem (1-port) converter detected
[ 16.712898] usb 1-1.4: GSM modem (1-port) converter now attached to ttyUSB4
[ 18.018400] usbcore: registered new interface driver qmi_wwan
[ 43.861150] PPP generic driver version 2.4.2
[ 43.918391] PPP BSD Compression module registered
[ 43.931422] PPP Deflate Compression module registered
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[ 15.593257] sd 3:0:0:0: [sda] Attached SCSI removable disk
[ 15.594265] sr 2:0:0:0: Attached scsi generic sg1 type 5
[ 15.614113] usbcore: registered new interface driver cdc_wdm
[ 15.621771] usbcore: registered new interface driver usbserial
[ 15.621924] usbcore: registered new interface driver usbserial_generic
[ 15.622034] usbserial: USB Serial support registered for generic
[ 16.050995] usbcore: registered new interface driver option
[ 16.051096] usbserial: USB Serial support registered for GSM modem (1-port)
[ 16.051670] option 1-1.4:1.0: GSM modem (1-port) converter detected
[ 16.052231] usb 1-1.4: GSM modem (1-port) converter now attached to ttyUSB0
[ 16.052527] option 1-1.4:1.3: GSM modem (1-port) converter detected
[ 16.052920] usb 1-1.4: GSM modem (1-port) converter now attached to ttyUSB1
[ 16.053005] option 1-1.4:1.4: GSM modem (1-port) converter detected
[ 16.053432] usb 1-1.4: GSM modem (1-port) converter now attached to ttyUSB2
[ 16.054896] qmi_wwan 1-1.4:1.1: cdc-wdm0: USB WDM device
[ 16.057809] qmi_wwan 1-1.4:1.1 wwan0: register 'qmi_wwan' at usb-3f980000.usb-1.4, WWAN/QMI device, 8e:12:03:69:82:b0
[ 16.058117] usbcore: registered new interface driver qmi_wwan
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cdc-wdm0 gsm connected 3g Code: Select all
ttyUSB2 gsm connected 3g
ppp0 unknown connected ppp0
I would prefer not to use ppp.
Regards
Klaus