Hi Denis,

On 21. 05. 13 15:24, Denis Kenzior wrote:
> On 05/17/2013 05:33 AM, Viallard Anthony wrote:
>> ofonod[10347]: drivers/atmodem/gprs-context.c:at_gprs_activate_primary()
>> cid 1
>> ofonod[10347]: src/gprs.c:pri_activate_callback() 0x108698
>> ofonod[10347]: src/gprs.c:pri_activate_callback() Activating context
>> failed with error: Unknown error type
>> ---------------------------
>>
>> I read the code, added some logs and found the function
>> at_chat_send_common() doesn't do his job because chat->command_queue is
>> NULL.
>>
>> I guess chat->command_queue is free and set to NULL in
>> chat_cleanup(struct at_chat *chat) but I don't dig more why this
>> function is call...
>>
>> Any ideas ?
>
> I think I've seen this before, or something similar. It may be that when
> the modem hangs up the PPP link it also hangs up the serial port (e.g.
> using a HUP). GAtChat thinks that the port has been closed and things no
> longer work.
>
> On most devices this behavior can be turned off by sending AT&C0 init
> string. Try that?
>

AT&C0 fixes the wrong behavior. Thanks !

Regards,
Anthony.