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I have Ericsson H5321gw WWAN modem (USB ID 0bdb:1926) on my Lenovo X230 laptop. I've got it working momentarily using NetworkManager GUI on Gnome3. Normally I can make it connect for a few minutes only to see the whole device being removed from NetworkManager later by itself. So technically it is working, but somehow the device keeps getting removed after a while (causing disconnection, of course). Initially I thought this might be an issue of USB Autosuspend power saving functionality but I have tried setting it off like so:

for i in /sys/bus/usb/devices/*/power/autosuspend; do echo -1 > $i; done

I have Debian Jessie with 3.10-3-amd64 kernel.

This is an example log from test where I got disconnected right away after connecting: http:// pastebin.com/ bGbTHGri (url pasting limit, sorry)

This is another test where I got disconnected after being connected for about 2 minutes:

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  • same problem here - did you ever figure this out?
    – vorburger
    Mar 3, 2015 at 18:00

1 Answer 1

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Ok, figured this out. You need to:

sudo cp /lib/udev/rules.d/77-mm-ericsson-mbm.rules /etc/udev/rules.d/ 

and then edit it to add an entry matching your card's lsusb output. That solved this for me.
Full blurb on my http://blog2.vorburger.ch/2015/03/fixed-linux-ericsson-h5321gw-3ggpshspa.html

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  • I gave up with the WWAN modem and started to use tethering on my cell phone instead. I'll try this out sometime and see if it works. Thanks for input! Mar 4, 2015 at 10:59
  • PS: Note askubuntu.com/questions/592988/… re. a (minor..) suspend/resume issue I'm seeing with this card.
    – vorburger
    Mar 5, 2015 at 8:02

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