Complete HUAWEI Mobile broadband E352 support

Bug #1334954 reported by Runar Ingebrigtsen
This bug affects 1 person
Affects Status Importance Assigned to Milestone
usb-modeswitch (Ubuntu)

Bug Description

usb_modeswitch kernel module tells me to report this bug :)

The modem works fine, it's just not stable.
Unplugging and reinserting creates a kernel oops that seems to prevent halting the system.

First time I plugged it in, I got an U-DEV popup error message. A little after that, there was a question about PIN code and the modem worked.

Unplugging and reinstering the device, it won't work. I have to reboot.

I added four lines in usb_modeswitch.conf:

At the last reboot, this made the U-DEV popup disappear and the modem asks for the PIN and works.

The work_device.txt attachment shows the kernel log for this event.

I will upload the log for when I unplug and reinsert the device as a separate file.

Tags: 3g huawei modem
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Runar Ingebrigtsen (ringe) wrote :
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Runar Ingebrigtsen (ringe) wrote :

Unplugging the modem.

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Runar Ingebrigtsen (ringe) wrote :

reinserting the mode gives kernel oops with NULL pointer reference

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Lars Melin (larsm17) wrote :

Please state which Ubuntu version, linux kernel version, and usb_modeswitch version you are using and also the content of the udev popup message.
The usb_modeswitch.conf file is for global configs and should not be used for individual device configuration, there should be a device config file named 12d1:14fe in the usb_modeswitch data package which you can find in /usr/share/usb_modeswitch/configPack.tar.gz

What you have entered in usb_modeswitch.conf is an incomplete device config (no switch method/switch message) so I doubt it has any effect, you should remove that.

Revision history for this message
Lars Melin (larsm17) wrote :

The kernel oops is btw from ModemManager and not from usb_modeswitch.
Make sure by checking the system log (after removing the faulty config in usb_modeswitch.conf) that usb_modeswitch switches the dongle from 12d1:14fe to 12d1:1506 at every insert.
If it does, then assign the bug to NetworkManager which should handle the dongles direct ethernet interface (cdc_ncm, huawei_cdc_ncm, and cdc_wdm. see the log for those).
It should not be handled by ModemManager which is for ppp dialup even though the dongle supports that mode.

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