I encountered PPP problem while trying to make a USB 3G modem working.
My Linux kernel is able to detect the modem (ttyUSB0 - ttyUSB3) and my
pppd deamon is started, dial up also OK (CONNECT received), however my
ppp link (ppp0) is not created so I am not able to browse Internet.
Would someone please give some ideas about it? It will be very helpful
and highly appreciated.
in init.rc
-------------------------------------------------------------------
service ril-daemon /system/bin/rild -l /system/lib/libreference-ril.so
-- -d /dev/ttyUSB3 -u /dev/ttyUSB0
socket rild stream 660 root radio
socket rild-debug stream 660 radio system
user root
group radio cache inet misc audio
--------------------------------------------------------------------
in init.gprs-pppd
---------------------------------------------------------------------
PPPD_PID=
/system/bin/setprop "net.gprs.ppp-exit" ""
/system/bin/log -t pppd "Starting pppd"
/system/bin/pppd /dev/ttyUSB0 115200 mru 1280 mtu 1280 nodetach debug
dump defaultroute usepeerdns novj novjccomp noipdefault ipcp-accept-
local ipcp-accept-remote connect-delay 5000 linkname ppp0
PPPD_EXIT=$?
PPPD_PID=$!
/system/bin/log -t pppd "pppd exited with $PPPD_EXIT"
/system/bin/setprop "net.gprs.ppp-exit" "$PPPD_EXIT"
-----------------------------------------------------------
Logs for your reference.
D/AT ( 873): AT> ATD*99***1#
D/AT ( 873): ATD*99***1#
D/AT ( 873):
D/AT ( 873):
D/AT ( 873): CONNECT
D/AT ( 873):
D/AT ( 873): AT< CONNECT
D/RIL ( 873): after ATD*99***1#
D/RIL ( 873): PPPd started
D/RIL ( 873): errno after open ppp 2
W/RIL ( 873): Can not detect PPP state in /sys/class/net/ppp0/
operstate. Will retry 9 times after 3 seconds
W/RIL ( 873): Can not detect PPP state in /sys/class/net/ppp0/
operstate. Will retry 8 times after 3 seconds
W/RIL ( 873): Can not detect PPP state in /sys/class/net/ppp0/
operstate. Will retry 7 times after 3 seconds
W/RIL ( 873): Can not detect PPP state in /sys/class/net/ppp0/
operstate. Will retry 6 times after 3 seconds
W/RIL ( 873): Can not detect PPP state in /sys/class/net/ppp0/
operstate. Will retry 5 times after 3 seconds
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