Re: No 3G after disconnecting

[wp1191918-hgvs <public van-schelve de>]

Marius Kotsbak <marius kotsbak gmail com> hat am 26. Juli 2011 um 12:40
geschrieben:

> Den 26. juli 2011 12:17, skrev wp1191918-hgvs:
> >   
> >
> > Marius Kotsbak<marius kotsbak gmail com>  hat am 26. Juli 2011 um 02:17
> > geschrieben:
> >
> >
> >> Den 25. juli 2011 12:08, skrev wp1191918-hgvs:
> >>>   Hi,
> >>>   
> >>> I have found the following problem with an Ericsson F5521gw 3G modem:
> >>>   
> >>> 1. start system
> >>> 2. bring up 3g connection by clicking on the configureation in nm-applet
> >>> 3. wait until connection is established and can be used
> >>> 4. disconnect from 3g connection
> >>> 5. when trying to bring up the connection again it fails
> >>>
> >> Seems like I found the cause. See my attached patch to the bug report:
> >>
> >> https://bugzilla.gnome.org/show_bug.cgi?id=650740
> >>
> >> --
> >> Marius
> >   
> > Hi Marius,
> >   
> > looks like with your patch I am no longer able to bring up the 3G connection
> > on
> > any time.
>
> Strange. I would recommend turning off and on the modem again (if you
> have a button for that, else turn off and on the laptop). Also make sure
> there is only one modem-manager running.
>
> Anyway, looking at the log it seems like the mbm module is not used at
> all (so I can't see that my patch made any difference). It uses general
> ACM PPP dial, not the usb0 ethernet connection. Make sure you have the
> "cdc_ncm" module.
>
> You also need the following patch (included in modemmanager >=0.4.996,
> but it is just a text file change needed):
>
> http://cgit.freedesktop.org/ModemManager/ModemManager/commit/?id=0b757465ffe6108066d32312ab4e895c372c8f72
>
> See also https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/792301
>
 
So I have patched the /lib/udev/rules.d/77-mm-ericsson-mbm.rules file and
rebooted my system. Now I have the following devices:
 
- Device: usb0  [Auto usb0] ----------------------------------------------------
  Type:              Wired
  Driver:            cdc_ncm
  State:             connected
  Default:           no
  HW Address:        02:80:37:EC:02:00

  Capabilities:
    Carrier Detect:  yes

  Wired Properties
    Carrier:         on

  IPv4 Settings:
    Address:         10.33.145.106
    Prefix:          29 (255.255.255.248)
    Gateway:         10.33.145.107

    DNS:             10.39.148.253
    DNS:             10.39.148.249
 
- Device: ttyACM0 --------------------------------------------------------------
  Type:              Mobile Broadband (GSM)
  Driver:            cdc_acm
  State:             disconnected
  Default:           no

  Capabilities:

With nm-applet I can do (dis)connect cycles for the 3G connection. But I need to
do this on "Ethernet (Lenovo F5521gw)" -> "Auto usb0"
while "Mobile Broadband" -> "3G-Mobil" does not work but is still shown in
nm-applet. This will make our user getting confused and so this is not a valid
workaround for our production.
 
So can someone tell me what the main problem is in this case and what has to be
done to fix it? 
 
-- HG