RE: Novatel based Mobile Broadband does not respond anymore

[richter ecos de]

Hi Dan,

thanks for your feedback. 

I will setup a build environment for modem manger and give it a try (it will take some time until I get the time to do so).

In case this solves the problem, I would suggest to add a udev variable to configure the charset order depending on the modem type ( I don't think it's necessary to create an extra plugin for this special case).

Would this make sense to you?

Thanks & Regards

Gerald


> -----Original Message-----
> From: Dan Williams [mailto:dcbw redhat com]
> Sent: Thursday, February 02, 2012 8:46 PM
> To: Gerald Richter - ECOS
> Cc: networkmanager-list gnome org
> Subject: Re: Novatel based Mobile Broadband does not respond anymore
> 
> On Thu, 2012-01-26 at 16:13 +0100, richter ecos de wrote:
> > Hi,
> >
> > we've problems with a Novatel based Mobile Broadband card.
> >
> > The serial device doesn't respond to AT Commands after it has been
> > initialized and a successfully registration to an apn.
> > The modem-manager falls back in an endless loop after that behavior.
> >
> > Bus 004 Device 002: ID 413c:8137 Dell Computer Corp. Wireless 5520
> > Voda L Mobile Broadband (3G HSDPA) Minicard Status Port
> >
> > The logfile is attached.
> >
> > Before we used network manager, we had a very simply umts solution,
> which only uses a few AT commands. This did work for quite a long time.
> >
> > It seems that the firmware crashes on some of the AT command (coldstart
> is necessary, to get the card working again).
> >
> > Any ideas?
> 
> I've seen the firmware of my 5510 (which is basically the EU870D except in
> ExpressCard form) crash when doing SMS-related stuff.  If you're able to
> rebuild ModemManager, try this patch and see if that helps anything:
> 
> diff --git a/src/mm-generic-gsm.c b/src/mm-generic-gsm.c index
> 3a1c62e..be63d97 100644
> --- a/src/mm-generic-gsm.c
> +++ b/src/mm-generic-gsm.c
> @@ -1260,10 +1260,10 @@ enable_failed (MMModem *modem, GError
> *error, MMCallbackInfo *info)  }
> 
>  static guint32 best_charsets[] = {
> +    MM_MODEM_CHARSET_IRA,
>      MM_MODEM_CHARSET_UTF8,
>      MM_MODEM_CHARSET_UCS2,
>      MM_MODEM_CHARSET_8859_1,
> -    MM_MODEM_CHARSET_IRA,
>      MM_MODEM_CHARSET_GSM,
>      MM_MODEM_CHARSET_UNKNOWN
>  };
> 
> Some modems don't deal well with UCS2 and my 5510 is one of them.  The
> charset doesn't just affect SMS so it might be causing the crashes.
> 
> Dan