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Huawei EC156 modem no longer detected after disconnected

rated 0 times [ 0] [ 0] / answers: 1 / hits: 2426 / 1 Year ago, sat, november 19, 2022, 7:55:18

I have just installed Ubuntu 13.04 Raring. Now I'm facing a problem with my Huawei EC156 modem.

At first it will work properly but it will disapear from network-manager if the modem is disconnected after online or removed from the USB slot. The 'Enable Mobile Broadband' would also disappear from Network Manager. The modem will appear again if I use it from Windows and then run it again on Ubuntu.

If the modem is detected correctly, dmesg would show something like this:

New USB device found, idVendor=12d1, idProduct=140c

but if it is not detected, dmesg would show this result:

New USB device found, idVendor=12d1, idProduct=1505

I have never seen this problem before in previous versions of Ubuntu. How can I fix it?

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utilitere

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answered 1 Year ago laiuct · Accepted Answer

I have found the answer from this blog. It's in Indonesian, so I'd like to translate and explain it a little bit.

All you need is two simple step:

Write a file for usb_modeswitch:

# nano /etc/usb_modeswitch.d/12d1:1505

Fill the file with these text:

DefaultVendor= 0x12d1 

DefaultProduct=0x1505 

MessageContent="55534243123456780000000000000011062000000100000000000000000000"

Issue command:

# usb_modeswitch -I -W -c /etc/usb_modeswitch.d/12d1:1505

Now the modem should has changed its mode and can be detected by NetworkManager.