Hi all,
I've found a strange behavior when I receive DTMF during voice call.
It seems that DTMF code are received and signaled twice, specifically
one time for each active AT port.
Jan 1 00:02:22 localhost ModemManager[1940]: <debug>
[1325376142.982264] [mm-port-serial-at.c:459] debug_log(): (ttyUSB0):
<-- '<CR><LF>^DDTMF: 9<CR><LF>'
Jan 1 00:02:22 localhost ModemManager[1940]: <debug>
[1325376142.982562] [huawei/mm-broadband-modem-huawei.c:3051]
huawei_voice_received_dtmf(): [^DDTMF] Received DTMF '9'
Jan 1 00:02:22 localhost ModemManager[1940]: <debug>
[1325376142.983283] [mm-port-serial-at.c:459] debug_log(): (ttyUSB2):
<-- '<CR><LF>^DDTMF: 9<CR><LF>'
Jan 1 00:02:22 localhost ModemManager[1940]: <debug>
[1325376142.983596] [huawei/mm-broadband-modem-huawei.c:3051]
huawei_voice_received_dtmf(): [^DDTMF] Received DTMF '9'
# dbus-monitor --system
signal sender=:1.0 -> dest=(null destination) serial=1362
path=/org/freedesktop/ModemManager1/Call/1;
interface=org.freedesktop.ModemManager1.Call; member=DtmfReceived
string "9"
signal sender=:1.0 -> dest=(null destination) serial=1363
path=/org/freedesktop/ModemManager1/Call/1;
interface=org.freedesktop.ModemManager1.Call; member=DtmfReceived
string "9"
Looking in commit log, I've found that problem is present since this
commit: "huawei: update to correct secondary port request and regex
masking for ^POSITION" (1f270c09d03b6c2c4c57fb9b8ca539243035992b)
This commit enable all unsolicited message (DTMF included) also on
secondary AT port.
In most cases unsolicited message can be handled twice or many times
without any side effect, but in the case of voice command (DTMF, call,
ecc...) this is a problem.
Reverting to the previous behavior (unsolicited message handled only on
primary AT port) DTMF are received correctly but there is a CPU loading
issue as reported by Marc Murphy (and verified by me).
Is this right ? Any ideas ?
Thanks,
Riccardo
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