On Fri, 2014-10-03 at 10:01 +0200, Erik Alapää wrote:
> Workaround: Bring up the device with
> AT^NDISDUP=1,1,"internet.telenor.se" instead. Also worth noting is
> that AT+CGACT=1,1 does not freeze the control connection if using
> /dev/ttyUSB0.
> 
> If more info is needed, let me know and I will provide it.

I suggest you take an usbmon trace to look for the CDC notification.

        Regards
                Oliver


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