Fatal error on the modem issue on WP7605 (with R16)

[bruceke]

The system keeps getting Fatal error on the modem and reboot after I enable WIFI and LTE functions…

Device: WP7605
IMEI: 353532100111918
IMEISV: E
FSN: 2A949485391010
Firmware Version: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
Bootloader Version: SWI9X07Y_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14
MCU Version:
PRI Part Number (PN): 9908705
PRI Revision: 002.006
Carrier PRI Name: GENERIC
Carrier PRI Revision: 002.095_000
SKU: 1104208
Last Reset Cause: Crash
Resets Count: Expected: 49 Unexpected: 6

I’m not sure what caused the system crash, but someone have the same problem on the forum :

WP7702 Crashes when using NB-IoT

Intermittent WP7700 module Failure: [Fatal error on the modem]

Asyal, Thanks for hte suggestion - precisely what I planned for 1st thing this morning - get a baseline. I’ve reflashed the modem firmware (ATT v9.1) - with no change. I’m not quite clear on a baseline build to load - or if the Recovery Procedure is what you imply. (incidentally per Shib’s recommendation I have built with the latest Legato 18.10.3). Appreciate any clarity/pointers, Mike

Intermittent WP7700 module Failure: [Fatal error on the modem]

Hi Mike, Just linking the two posts, in case anyone can use the response posted in the general WP forum: Thanks, Ryan

What is the cause of this? and how can I fix this problem?
Thank you

[jyijyi]

can it be a possibility that not enough current provided to the module?

[bruceke]

After the test, it seems that it is more likely to happen when the USB cable is connected … so I don’t think it’s caused by electric current.

Another issue is LTE disconnection after USB cable connect to PC , the original LTE connection will be disconnected

[jyijyi]

I don’t see original LTE connection is disconnected after USB cable connected to PC with FW R13:

Poky (Yocto Project Reference Distro) 2.5.2 swi-mdm9x28-wp /dev/ttyHSL1

swi-mdm9x28-wp login: root
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# echo NO_SLEEP > /sys/power/wake_lock
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# cm data apn smartone
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# [   83.775632] Failed to wake up the USB core. ret=-95
[   83.781008] Failed to wake up the USB core. ret=-95
[   84.062658] Failed to wake up the USB core. ret=-95
[   84.871693] Failed to wake up the USB core. ret=-95
[   84.892822] Failed to wake up the USB core. ret=-95

root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# cm data
Index:                         1
APN:                           smartone
PDP Type:                      IPV4
Connected:                     no
Auth type:                     PAP
User name:
Password:
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# cm data connect &
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# Setting up profile 1
Connecting ... ok
Checking if device 'rmnet_data0' is up ... ok
Routing inet ... ok
mv: can't remove '/etc/resolv.conf': Device or resource busy
Updating /etc/resolv.conf ... ok
Updating /etc/resolv.conf ... ok
Testing connection ...
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# cm data
Index:                         1
APN:                           smartone
PDP Type:                      IPV4
Connected:                     yes
Auth type:                     PAP
User name:
Password:
Interface:                     rmnet_data0
Family[IPv4]:                  inet
IP[IPv4]:                      10.158.102.153
Gateway[IPv4]:                 10.158.102.154
Dns1[IPv4]:                    10.30.23.133
Dns2[IPv4]:                    10.30.25.133
root@swi-mdm9x28-wp:~#


//here I connect the USB cable from PC


root@swi-mdm9x28-wp:~# [  101.263088] ch_notify on a closed smd_pkt_dev id:2

root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# cm data
Index:                         1
APN:                           smartone
PDP Type:                      IPV4
Connected:                     yes
Auth type:                     PAP
User name:
Password:
Interface:                     rmnet_data0
Family[IPv4]:                  inet
IP[IPv4]:                      10.158.102.153
Gateway[IPv4]:                 10.158.102.154
Dns1[IPv4]:                    10.30.23.133
Dns2[IPv4]:                    10.30.25.133


root@swi-mdm9x28-wp:~# microcom /dev/ttyAT
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: WP7609
Revision: SWI9X07Y_02.28.03.05 000000 jenkins 2019/07/08 11:04:16
IMEI: 359782080100373
IMEI SV:  6
FSN: WA803370311610
+GCAP: +CGSM

OK
[  263.067911] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv_addr:0x3a MSTR_STS:0x0c1300c8 OPER:0x00000090
[  263.083969] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv_addr:0x3a MSTR_STS:0x0c1300c8 OPER:0x00000090

Legato Ver: 19.02.0_4cb954265427b8c2c668a010ff5be274
Yocto Ver:  FLDIST00_02.28.03.05 2021-09-17_11:30:43
OS Ver: Linux version 3.18.131 (oe-user@oe-host) (gcc version 7.3.0 (GCC) ) #1 PREEMPT Fri Sep 17 10:55:21 UTC 2021
LK Ver: SWI9X07Y_02.28.03.05
RootFS Ver: FLDIST00_02.28.03.05 2021-09-17_11:30:43
UserFS Ver: unknown
MCU Ver: 002.011

OK

[bruceke]

okay , I will try to verify with R13 , thanks.