Duplicate entries with Alcatel X060 (and possibly other) broadband modems

Bug #392869 reported by Javier Martín
This bug affects 2 people
Affects Status Importance Assigned to Milestone
network-manager (Ubuntu)
Nominated for Jaunty by ToniTC
Nominated for Karmic by ToniTC

Bug Description

Binary package hint: network-manager_0.7.1~rc4.1.cf199a964-0ubuntu2_i386.deb


Apparently the modem exposes two serial interfaces with GSM capabilities but only one works while the other crashes the modem. This is identical to bug #342775, only it's a different device.

This patch to nm-modem-probe.c works around the issue in a similiar way as with the huawei devices. If the probed interface is the good one then go ahead, else ignore and log the issue.

Revision history for this message
Javier Martín (jmartinj) wrote :
description: updated
Changed in network-manager (Ubuntu):
status: New → Triaged
Revision history for this message
Alexander Sack (asac) wrote :

please attach your complete syslog.

also attach the output if you run

/lib/udev/nm-modem-probe --verbose --export /dev/ttyXXX0

on both of your devices.

Revision history for this message
Alexander Sack (asac) wrote :

syslog after reproducing this problem please.

Alexander Sack (asac)
Changed in network-manager (Ubuntu):
importance: Undecided → Low
Revision history for this message
Javier Martín (jmartinj) wrote :

I am attaching the relevant syslog output captured while the serial USB devices are being detected and probed by NetworkManager. I also added the output of /lib/udev/nm-modem-probe --verbose --export /dev/ttyXXX0 for each port.

As shown in the log, both ttyUSB1 and ttyUSB2 report GSM capabilities, but only one (if3) does work. The other (if1) either crashes the modem or does nothing.

The patch I posted fixes this by checking the value of the --vid and --usb-interface parameters passed by NetworkManager to nm-modem-probe so that the "wrong" interface is ignorred and only the right interface is displayed to the user.

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