[Gta04-owner] Replicant modem suspend behavior

[Radek Polak]

On Friday, December 12, 2014 04:17:54 PM Lukas Maerdian wrote:

> Hello everybody,
> 
> since quite some time I'm trying to debug the Replicant modem suspend
> behavior, but I cannot find any solution...
> 
> My problem is that the modem transitions into a strange state after a
> suspend/resume cycle, where it just returns the CME error 0 (phone
> failure) to every single AT command I send. If I kill/restart the Radio
> Interface Layer ("killall rild"), the modem seems to be working fine
> again, so I guess a "AT+CFUN=0; AT+CFUN=1" correctly resets the modem.
> 
> I looked into the FSO/SHR and QtMoko sources, but could not find any
> special suspend handling for the modem, so I assume they didn't have any
> such problem. Did anybody of you already observe this behavior of the
> modem? What does "phone failure" mean? How does the modem get to this
> state? And how can I recover from that state, without a full reset?

Hi,
in QtMoko i used to have sometimes problems with talking to serial port. IIRC 
i fixed this by closing the serial port before suspend and reopening after 
resume - followed with CLCC command to check if we have any incoming calls 
(and similart for SMS).

But this problem looks like something different...

Regards

Radek