Mobile Network settings crashing on Android x86

IoT Modules MC/EM Series
1

Hi,

I have integrated the RIL source 8.1.2 into my Android source based on the Android-x86 platform. We are using EM7455 modem. Previously we were unable to bring up Mobile Network, but after few changes in HAL layer we are able to see now. But we are facing some issues after the changes in HAL layer.

Below are my observations let me know if I can provide any logs.

  1. Sometimes It is registering the Mobile Network and sometimes not.
  2. For registering the Network manually when we click on “Mobile network” in Settings application crashes and It says “com.android.phone has stopped” below is the picture attached for your reference.

COM_ANDROID_PHONE_STOPPED
COM_ANDROID_PHONE_STOPPED.jpg2000×1125 729 KB

Please guide me to solve this problem, Thanks in advance.

Thanks,
Sateesh

2

  1. You can check signal quality and register status by at! gstatus? When problem happens.

  2. You need to chech radio log to see if the ril crashes. Also you can check kernel log to see if module crashes by see if any usb disconnect message appeared.

3

Hi @jyijyi,

I checked register status, Below is the output of AT command, and I have also checked kernel logs, I haven’t found “USB disconnected”, I am providing the kernel logs and logcat
and radio logs below.

AT!GSTATUS?

!GSTATUS:
Current Time: 405 Temperature: 40
Reset Counter: 2 Mode: ONLINE
System mode: WCDMA PS state: Not attached
WCDMA band: WCDMA BC3
WCDMA channel: 1327
GMM (PS) state:DEREGISTERED LIMITED SERVICE
MM (CS) state: IDLE LIMITED SERVICE

WCDMA L1 state:L1M_PCH_BPLMN LAC: 1839 (6201)
RRC state: DISCONNECTED UTRAN Cell ID: 001BA7D1 (1812433)
RxM RSSI C0: -101 RxD RSSI C0: —
RxM RSSI C1: — RxD RSSI C1: —

logcat (while app crashing)

logcat_com_android_phone_stopped_oct25.txt (17.6 KB)

logcat -b radio (while app crashing)

logcat_radio_oct25.txt (180.4 KB)

kernel logs

dmesg_oct25.txt (73.8 KB)

Please check the above logs and guide me to solve this issue.

Thanks,
Sateesh

4

“PS state: Not attached” means module is not registered to network.

5

Hi @jyijyi

What to do to register the network?

Thanks,
Sateesh

6

Did your sim work fine?

8

yes, It is working fine in my mobile.

Thanks,
Sateesh

9

No idea, suggest you try other operator and other sim card.