Problem with mm-1.0.0 and Dell 5560

[Dan Williams]

On Wed, 2013-12-18 at 13:09 +0100, Marek Kaluba wrote:
> Ok, 
> 
> Gentoo doesn't have libmbim in the official tree, so the modemmanager 
> ebuild disables mbim by default.
> 
> econf \
> 		  --disable-more-warnings \
>                 --with-udev-base-dir="$(udev_get_udevdir)" \
>                 --disable-static \
>                 --with-dist-version=${PVR} \
>                 $(use_with policykit polkit) \
>                 $(use_with qmi) \
>                 $(use_with qmi-newest newest-qmi-commands) \
>                 --without-mbim
> 
> Still after modprobing cdc_ncm prefer_mbim=N (and restarting NM, 
> relogging, etc) MM coudn't find the valid data port (the same error).
> 
> I've added libmbim to my local overlay and changed MM ebuild to use it -- 
> modem works nicely now (well, I managed to connect via click in NM).
> 
> I think that the modem could work without mbim (at least it worked with 
> wvdial), but some internals of MM (or maybe NM?) obstructed it to do so.

It's actually ModemManager that makes the decision about what kind of
data ports it supports.  NetworkManager just follows along.

When a modem exposes a network interface, ModemManager will always try
to use it, because the network device is usually simpler, less
error-prone, and has much faster throughput than PPP.  Since all the
Ericsson modems support a network device, ModemManager will only use the
network device.  We'd prefer to fix issues related to the use of the
network device than try to support both PPP and network devices on these
modems.

Dan

> For Your information i attach my /etc/wvdial.conf
> the particular connection was aero2.
> 
> Cheers,
> Marek
> 
> On Wednesday 18 December 2013 09:39:34 you wrote:
> > Marek Kaluba <abulak at gmail.com> writes:
> > > Thanks for a very fast answer.
> > > 
> > > Unfortunately these instructions do not work for me (I've tried them
> > > before). As a side note, wvdial works perfectly in either configurations.
> > 
> > Does this mean that this is an Ericsson device without NCM support? Or
> > are there other reasons why those instructions did not work?  What
> > happened when you tried?
> > 
> > Or is there an additional problem that this device ID isn't known as an
> > Ericsson MBM device?
> > 
> > 
> > 
> > Bjørn
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