Why is GSM network disconnected?

Hello.
i used WP7502 legato 18.06
I see disconnect GSM network in during 24 hours.
my log
Nov 20 15:03:59 swi-mdm9x15 user.warn kernel: [15093.174727] hwrng: no data available
Nov 20 15:53:00 swi-mdm9x15 user.warn kernel: [18033.703492] NOHZ: local_softirq_pending 08
Nov 20 19:30:29 swi-mdm9x15 user.warn kernel: [31082.465889] hwrng: no data available
Nov 20 22:52:35 swi-mdm9x15 user.info Legato: INFO | modemDaemon[775]/modemDaemon T=main | le_mrc.c NetworkRejectIndHandler() 1345 | Network Reject Ind Handler called with RAT.5, mcc. and mnc.
Nov 20 22:52:35 swi-mdm9x15 user.err Legato: =ERR= | modemDaemon[775]/le_pa T=unknown | pa_mrc_qmi.c EventReportHandler() 1400 | Network Registration failed error code 15
Nov 20 22:52:37 swi-mdm9x15 user.info Legato: INFO | modemDaemon[775]/modemDaemon T=main | le_mrc.c SignalStrengthIndHandlerFunc() 819 | Signal Strength Ind Handler called with RAT.5 and ss.-125
Nov 20 22:52:37 swi-mdm9x15 user.info Legato: INFO | modemDaemon[775]/modemDaemon T=main | le_mrc.c SignalStrengthIndHandlerFunc() 819 | Signal Strength Ind Handler called with RAT.4 and ss.-125
Nov 20 22:52:37 swi-mdm9x15 user.warn Legato: -WRN- | modemDaemon[775]/le_pa T=main | pa_sim_qmi.c MapSimState() 879 | More than one application 3
Nov 20 22:52:50 swi-mdm9x15 user.info Legato: INFO | modemDaemon[775]/modemDaemon T=main | le_mrc.c SignalStrengthIndHandlerFunc() 819 | Signal Strength Ind Handler called with RAT.5 and ss.-125
Nov 20 22:52:50 swi-mdm9x15 user.info Legato: INFO | modemDaemon[775]/modemDaemon T=main | le_mrc.c SignalStrengthIndHandlerFunc() 819 | Signal Strength Ind Handler called with RAT.2 and ss.-63
Nov 20 22:52:50 swi-mdm9x15 user.info Legato: INFO | modemDaemon[775]/le_pa T=main | pa_mrc_qmi.c pa_mrc_GetNetworkRegState() 2138 | called
Nov 20 22:52:50 swi-mdm9x15 user.warn Legato: -WRN- | modemDaemon[775]/le_pa T=main | pa_sim_qmi.c MapSimState() 879 | More than one application 3
Nov 20 22:52:50 swi-mdm9x15 user.warn kernel: [43224.121435] Alignment trap: netmgrd (843) PC=0x4d374280 Instr=0xe1c980d0 Address=0xb67cbed6 FSR 0x001
Nov 20 22:52:50 swi-mdm9x15 user.warn kernel: [43224.143623] Alignment trap: netmgrd (843) PC=0x4d374284 Instr=0xe1c320d0 Address=0xb67cbede FSR 0x001
Nov 21 00:03:26 swi-mdm9x15 user.warn kernel: [47459.783482] hwrng: no data available
Nov 21 00:03:36 swi-mdm9x15 user.warn kernel: [47469.793402] hwrng: no data available

why is the call to NetworkRejectIndHandler() called?
and interface “rmnet0” is down.
How to fix it?

Hi zuuuuk,

Not sure you have resolved the issue?

From log shared, it seems issue maybe related to network reject, thus data connection (rmnet0) is drop…
But cannot sure why it happens.

Would you check and share response of below during 1) normal operation and 2) during it disconnect?
Linux command:

  • cm radio

AT command:

  • AT!GSTATUS?
  • AT+CEER

Also, is it possible to test using different carrier’s SIM?
Or if you can test at different location to see any change?

Are you running your Legato app to face this issue?

Thanks.