Arch Linux

durazell

Member

From: Finland

Registered: 2013-04-05

Posts: 4

3G/4G connection problems

Hello

I have Huawei E392 LTE modem. It performs really well on Windows 7 (6,2MB/1MB per second and low ping) but for some reason my arch installation doesn't like it. Until yesterday modem was recognized by arch and I could connect using wvdial or sakis3g. However immediately after i try to use the connection ppp0 interface disappears and wvdial says 'modem not responding' and sakis3g just closes. Other interface that appears when connecting, wwan0 stayed in list but it didn't have ip address so i couldn't use it.
Yesterday I updated many packages such as modemmanager, gnome and latest kernel. Now after updating the modem is not recognized (Wvdial: Cannot open /dev/ttyUSB0: No such file or directory), but i can access it's data partition which is recognized as cdrom drive.

other info:
- This dongle works on other computer running arch. It has Asus P6T-SE motherboard and this one is Gigabyte GA-Z77X-UD3H.
- Sometimes everything just freezes when i plug the dongle and i need to shutdown using power button and one time i got a kernel panic (something about xhci usb).  but this happens only after i have logged in
- connection is roamed to my carrier's subnetwork

I'd appreciate if someone can help me with this .

EDIT: Apparently ModemManager gets overflow errors on startup, and when you try to connect to network it cannot get phone number (does 3g/4g modem sim card even have one?)
http://pastebin.com/YjAUnRsF

EDIT2: ModemManager --debug http://pastebin.com/K77aJjd9

Last edited by durazell (2013-04-24 16:44:07)

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Secretly hoping for better Asus Xonar DG alsa driver

rxxt

Member

Registered: 2011-05-07

Posts: 17

Re: 3G/4G connection problems

I also have the Huawei E392, and as you can see here I also got the problem: https://bbs.archlinux.org/viewtopic.php … 1#p1262561

I think it maybe have something to do with 'modemmanager 0.7.990-3' and the QMI support: http://sigquit.wordpress.com/2012/08/20 … to-libqmi/
because a lot look different in my logs, it seems that it is not using PPP anymore, like before.. And now it use the 'qmi_wwan' driver and shows up as 'cdc-wdm0'..

Hope someone know more about it..

Last edited by rxxt (2013-04-24 01:44:15)

Janhouse

Member

Registered: 2010-10-02

Posts: 29

Re: 3G/4G connection problems

Well, in kernel 3.9.5 the driver seems to be working but ModemManager doesn't support my Huawei E3276. wvdial also doesn't want to connect for me. Probably has something to do with the fact that these devices have no control ports available in /dev/ (just one /dev/ttyUSB0).
So I wrote this per lscript that sends AT commands and gets it up and running without any problems: https://github.com/Janhouse/4g-connect-linux

durazelI

Member

Registered: 2013-12-18

Posts: 9

Re: 3G/4G connection problems

E392 finally works ^^! In case someone else is struggling here are commands I used (sudo everything).

Install modemmanager, libqmi and usb_modeswitch.

Make sure you have /dev/cdc_wdm0 or modeswitch if it's missing. See lsusb for correct id.. in this case 12d1:1506.  Original source here.

>usb_modeswitch -v 12d1 -p 151a -V 12d1 -P 1506 -W -M "55534243123456780000000000000011062000000100000000000000000000"

>modprobe qmi_wwan
>usbserial vendor=0x12d1 product=0x1506

Next start modem manager..

#this didn't work
>qmicli -d /dev/cdc-wdm0 --wds-start-network=internet --client-no-release-cid
>qmi-network /dev/cdc-wdm0 start
>qmi-network /dev/cdc-wdm0 stop

#this works. connect/disconnect
>ModemManager
>sudo mmcli -m 0 --simple-connect="apn=internet,ip-type=ipv4" --verbose
>sudo mmcli -m 0 --simple-disconnect