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On 2014-10-14T09:16:02+00:00 Aleksander Morgado wrote:

Originally reported at:

https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/540003
https://bugzilla.gnome.org/show_bug.cgi?id=632219

The Ericsson/MBM modems don't use PPP for the data connection, as they
expose a network interface, and therefore the APN authentication
settings (user/pass) are not given to pppd. Instead, ModemManager uses
the following command to preconfigure the authentication settings to use
before launching the connection:

  AT*EIAAUW=2,1,"username","password"

The given username and password are given in the current charset
encoding configured in the modem, which should be UTF-8 preferably.

Now, the problem is that when special characters are required by the
operator, e.g. in the username, the connection will not succeeed. E.g.
for A1/Austria operator:

  AT*EIAAUW=2,1,"ppp@xxxxxxxxx","ppp"

The issue may therefore be that we either don't pass the
username/password encoded properly OR that the modem firmware actually
has a bug in that command handling.

Debug logs with MM 1.x are needed.

Also, it would be a good idea to check whether the setting is READ properly after being written, with:
  AT*EIAAUR=2,1

Note that PPP on the TTY with those same username/password will actually
work.

Reply at: https://bugs.launchpad.net/ubuntu/+source/network-
manager/+bug/540003/comments/23


** Changed in: modemmanager
       Status: Unknown => Confirmed

** Changed in: modemmanager
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/540003

Title:
  network-manager doesn't work with dell 5530 hsdpa mobile broadband

Status in ModemManager (with NetworkManager support):
  Confirmed
Status in “network-manager” package in Ubuntu:
  Invalid

Bug description:
  Network manager doesn't connect to mobile broadband using the Dell
  5530 hsdpa mini-pci card. Shows up in network-manager as having a gsm
  device, but even with the correct settings it wont connect.

  I did manage to get it working by installing gnome-ppp and manually
  configuring AT commands the card requires to active the radio and set
  the APN. I can get connected this way, but it is not as nice as being
  able to use network-manager. It also required my user to be added to
  the dialout and dip groups I think.

  The 5530 card requires these AT commands to activate radio and set the APN and so on:
  AT+CFUN=1
  ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
  AT+CGDCONT=1,"IP","VirginBroadband"

  Obviously replacing the VirginBroadband with the appropriate APN for
  the connection.

  I don't know if its worthwhile but maybe if the network-manager tool
  had the ability to customise AT init strings under and advanced button
  for mobile broadband or dial-up modems?

  Also the card also supports GPS which can be enabled with (for example):
  AT+CFUN=1
  AT+E2GPSCTL=1,5,1
  AT+E2GPSNPD

  lsb_release -rd :
  Description:	Ubuntu lucid (development branch)
  Release:	10.04

  timw@timw-laptop:~$ apt-cache policy network-manager
  network-manager:
    Installed: 0.8-0ubuntu2
    Candidate: 0.8-0ubuntu2
    Version table:
   *** 0.8-0ubuntu2 0
          500 http://archive.ubuntu.com/ubuntu/ lucid/main Packages
          100 /var/lib/dpkg/status

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