[ltp] 2nd gen X1 carbon 3g/lte Sierra Wireless EM7345 4G LTE

Chuck Aurora linux-thinkpad@linux-thinkpad.org
Wed, 2 Apr 2014 04:27:44 -0500

On Wed, Apr 02, 2014 at 10:24:27AM +0200, Bj=F8rn Mork wrote:
> morten <mortenlarsens@gmail.com> writes:
> > dmesg output at boot
> > [    8.530427] usbcore: registered new interface driver cdc_ncm
> > [    8.535195] usbcore: registered new interface driver cdc_wdm
> > [    8.549669] cdc_mbim 2-4:1.0: cdc-wdm0: USB WDM device
> > [    8.554268] cdc_mbim 2-4:1.0 wwan0: register 'cdc_mbim' at
> > usb-0000:00:14.0-4, CDC MBIM, c6:92:45:62:05:05
> > [    8.555083] usbcore: registered new interface driver cdc_mbim
> > [    8.555543] usbcore: registered new interface driver btusb
> > [    8.557955] cdc_acm 2-4:1.2: This device cannot do calls on its
> > own. It is not a modem.
> > [    8.558002] cdc_acm 2-4:1.2: ttyACM0: USB ACM device
> > [    8.560226] usbcore: registered new interface driver cdc_acm
> > [    8.560230] cdc_acm: USB Abstract Control Model driver for USB
> > modems and ISDN adapters
> Great!  So there is a serial port (AT command?) as well, and it
> is also a proper CDC class function so we don't need any vendor=20
> specific stuff to support it. Thanks Intel.  It's good to see
> such things.
> Are the 4 USB interfaces use by the cdc_mbim and cdc_acm
> drivers the only ones on this modem, or are there other
> (possibly unsupported) functions as well?

That's what I was wondering. I have an external USB device, the=20
Pantech UML295 (Verizon being the carrier.) It gives me this=20
cdc_ether driver:

Mar 31 17:25:26 tp kernel: [379939.016993] cdc_ether 3-6:1.0 eth1:=20
register 'cdc_ether' at usb-0000:00:14.0-6, CDC Ethernet Device,=20

All I have to do is to DHCP on this Ethernet interface, and=20
"mbb.vzw.com[]" becomes my gateway. It gives me a
little HTTP interface ( http://mbb.vzw.com/ ) to manage the
connection. Click connect, and Bob's your uncle, I'm online.

The internal mini-PCI cards do not have this? Or does cdc_mbim=20
conflict with cdc_ether? (Hmm, I guess not, unless cdc_mbim was=20
blacklisted somehow; I have both drivers.)

I'm looking at a Gobi 5000 for my Thinkpad T440p, but it is a $200=20
gamble, more if I have to pay for SIM activation. (I'm guessing I=20
might be able to use the Pantech's SIM for testing?)

It would be nice to have a real, routeable IP address, but the
important thing is to be able to USE the Internet connection.

So, Bj=F8rn, do you need another tester for the Gobi? Does the=20
prognosis look good?
    Chuck Aurora | cba@isc.org | ISC Support