2016-03-04 12:18 GMT+02:00 matti kaasinen <matti.kaasi...@gmail.com>:

> It's NM the one creating the interface. Did you compile NM in yocto
>> with ppp support? (--with-ppp I think it is) What's the configure
>> report output? This would be when you want to force the legacy PPP
>> method, though. I still believe you should try NDISDUP on the
>> /dev/cdc-wdm0 and WWAN with DHCP... :)
>>
> Good point, ppp is not enabled! Option seems to be --enable-ppp. I'll try
> it. This NDISDUP seemp pretty problematic. In fact I found MM patch whose
> introduction comment describes pretty much how this modem works (
> https://cgit.freedesktop.org/ModemManager/ModemManager/log/?h=dcbw/huawei-at-dhcp).
> I'll check if that helps/works with this MM version - then I suppose, I
> should contact MM mailing list...
>
>>

This was the problem with ppp connection. PPP connection started working
after inserting --enable-ppp option to networkmanager configuration optios
(in fact EXTRA_OECONF_append = " --enable-ppp " in my
networkmanager_0.9.8.10.bbappend recipe). Somehow NDISDUP does not seem too
appealing now. It does not show up as device in nmcli d listing. Nor does
it open interface automatically like Huawei 3131/Hilink does. It would
require some kind of patching/more debugging. If it then worked like Huawei
3131/HiLink - no need of touching nmcli command at all and no need of
writing configuration file - then I would be interested in trying it.
Otherwise, I don't see what I get out of it compared to PPP connection.
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