Re: ModemManager : 3G dongle disconnection

[Bin Li <libin charles gmail com>]

2010/7/2 Stéphane Régnier <sregnier ubiquiet com>:
> Dear programmer,
>
> I have difficulties to solve my disconnection problem, I hope you can
> help.
>
> I'm using a 3G usb key, huawei e180, with NetworkManager 0.8 and
> ModemManager 0.3. Once connected, without using the network and after
> exactly 30 minutes, it disconnects and never comes back until I restart
> ModemManager.
> Looking to ModemManager traces I found :
> ** Message: (ttyUSB1) closing serial device...
> ** Message: (Huawei): GSM
> modem /sys/devices/platform/ehci-omap.0/usb1/1-1 claimed port ttyUSB1
> ** Message: (ttyUSB0) closing serial device...
> ** Message: Modem /org/freedesktop/ModemManager/Modems/0: state changed
> (connected -> disconnecting)
> ** Message: Modem /org/freedesktop/ModemManager/Modems/0: state changed
> (disconnecting -> connected)
> ** Message: Modem /org/freedesktop/ModemManager/Modems/0: state changed
> (connected -> disconnecting)
> ** Message: Modem /org/freedesktop/ModemManager/Modems/0: state changed
> (disconnecting -> connected)
>
> In NetworkManager, traces corresponding to a dbus activate :
> NM: <info>  Activation (ttyUSB0) starting connection 'bouyguestel'
> NM: <info>  (ttyUSB0): device state change: 3 -> 4 (reason 0)
> NM: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare)
> scheduled...
> NM: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare)
> started...
> NM: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete.
> NM: <WARN>  stage1_prepare_done(): GSM modem connection failed: (32)
> Sending command failed: device is not enabled
> NM: <info>  (ttyUSB0): device state change: 4 -> 9 (reason 1)
> NM: <info>  Marking connection 'bouyguestel' invalid.
> NM: <info>  Activation (ttyUSB0) failed.
> NM: <info>  (ttyUSB0): device state change: 9 -> 3 (reason 0)
> NM: <info>  (ttyUSB0): deactivating device (reason: 0).
>
> And lsof confirms that modem-manager has no ttyUSB opened.
> It seems that a modem-manager restart or a simple AT command each 30
> minutes is efficient to keep connection alive but I prefer correct cause
> than consequence. It could help me to know the reason (and the answer?)
> of that 30 minutes timeout, and where it comes from (3Gkey,ehci,mm,nm?).
I use the e180 at openSUSE 11.3 RC2, and found after exactly 10
minutes, it disconnects, when connect it again, it works fine.
Provide more modem-manager debug maybe helpful.
# killall -TERM NetworkManager
# killall -TERM modem-manager
# modem-manager --debug
In another start the NetworkManager

> Thanks for the help
>
> Stéphane
>
>
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