Huawei E160E USB modem fails to connect with ModemManager-1.0.0 and NetworkManager-0.9.8.8

[Dan Williams]

On Sat, 2013-11-23 at 23:25 +1100, David Allen wrote:
> On 06/11/13 01:27, David Allen wrote:
> >
> > On 06/11/13 00:59, david.a58 at optusnet.com.au wrote:
> >>
> >>
> >>
> >>
> >>     ----- Original Message -----
> >>     From:
> >>     "Aleksander Morgado" <aleksander at lanedo.com>
> >>
> >>     To:
> >>     "David Allen" <david.a58 at optusnet.com.au>
> >>     Sent:
> >>     Tue, 05 Nov 2013 09:20:31 +0100
> >>     Subject:
> >>     Re: Huawei E160E USB modem fails to connect with
> >>     ModemManager-1.0.0 and NetworkManager-0.9.8.8
> >>
> >>     >>>
> >>     >> Could you get ModemManager debug logs?
> >>     >> http://www.freedesktop.org/wiki/Software/ModemManager/Debugging
> >>     >>
> >>     >> MM 1.0 is using the QMI support in the modem; not AT+PPP. We
> >>     need to
> >>     >> understand where and why it fails.
> >>     >>
> >>     > Thankyou for your interest. It is much appreciated.
> >>     >
> >>     > I had tried to get the debug messages from ModemManager using the
> >>     > instructions from the page you linked, but something must be
> >>     different
> >>     > with my setup.
> >>     > I have found that if I use the command "su -c
> >>     '/usr/sbin/ModemManager
> >>     > --debug; /usr/sbin/NetworkManager --no-daemon --log-level=DEBUG
> >>     &' " the
> >>     > logs appear to be complete and I can then use nmcli to attempt a
> >>     > connection
> >>     >
> >>     > Please find attached the revised debug logs:
> >>     > dump_working_revised.txt - Recorded with earlier versions
> >>     > dump_notworking_revised.txt - Recorded with later versions
> >>     >
> >>     >
> >>
> >>     For some reason ModemManager debug logs in the
> >>     'notworking_revised' one
> >>     do *not* have the chunk of info where the connection attempt is
> >>     done...
> >>     Can you retry that test, with the commands that best work for you to
> >>     setup debug logging, and then retry the connection attempt with
> >>     nmcli?
> >>
> >>     Also, please CC the mailing list as well in your reply.
> >>
> >>
> >>     -- 
> >>     Aleksander
> >>
> > Please find attached another attempt at getting a full debug log. This 
> > time I renamed the ModemManager and NetworkManager executables and 
> > created scripts that called these renamed files with the debug options 
> > in the hope that any respawned processes would continue debug logging.
> >
> > David
> >
> >
> >> ------------------------------------------------------------------------
> >>
> >
> My sincere apologies to you and the list.
> It turns out that the problem is with the version of dhcpcd (6.0.5) that 
> was in use. Reverting to dhcpcd-5.6.6 allows my Huawei E160E USB modem 
> to connect with ModemManager-1.0.0 and NetworkManager-0.9.8.8

Interesting; would you mind wiresharking the DHCP packets to/from the
modem so we can see what's different between the two versions of dhcpcd?

Dan