Ubuntu
network-manager package

  1. Bug #371291
  2. Comment #0

Comment 0 for bug 371291

Revision history for this message
Christof Länzlinger (laenzlinger) wrote : NetworkManager does not connect to Mobile Broadband anymore in Jaunty (Sierra AC880)

Binary package hint: network-manager

Ubuntu: 9.04
network-manager: 0.7.1~rc4.1.cf199a964-0ubuntu2

I have recently installed Ubuntu 9.04 on my lenevo T61. I am using a mobile broadband card (Sierra Wirelss Aircard 880) to connect to the mobile broadband network.

In Ubuntu 8.04 it was working fine by using the NetworkManager. I only had to remove the APN setting in the Advanced Settings of the Connection to get it working. See also attachment nm-ppp-ubuntu8_10.log)

Now in Ubuntu 9.04 - in completely fresh installation - I cannot connect anymore to my mobile operator. (see attachment nm-ppp-ubuntu9_04-org.log)

First I guessed that the following warning was the reason for the problem:

** (process:19537): WARNING **: Could not get secrets: Rejected send message, 7 matched rules; type="method_call", sender=":1.223" (uid=0 pid=19537 comm="/usr/sbin/pppd nodetach lock nodefaultroute debug ") interface="org.freedesktop.NetworkManager.PPP" member="NeedSecrets" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=19390 comm="NetworkManager --no-daemon "))
Unable to obtain CHAP password for gprs on UMTS_CHAP_SRVR from plugin

Therefore I was trying to modify the dbus rules for the NetworkManager in the file /etc/dbus-1/system.d/NetworkManager.conf. I was removing the following section:

 <deny send_destination="org.freedesktop.NetworkManager"
                      send_interface="org.freedesktop.NetworkManager.PPP"/>

This actually helped to get rid of the above mentioned warning. But still without success to connect to my mobile operator. In the log files I can now see that the connection is suddenly aborted in the IPCP negotiaten phase. Actually, no IPCP Response is received at all. (See attachment nm-ppp-ubuntu9_04.log). The same actually happend also without the above mentioned fix of the dbus rules.

My knowledge about the PPP Protocol is very limitted so I do not have any idea how to go on from this point. So any help is very much appreciated.

The log files were captured using the procedure described in the wiki for Network Manager, but with additional PPP debug information.