wda-get-data-format randomly returns error: couldn't create client for the 'wda' service

[Tor Rune Skoglund]

Hello list,

I am experiencing a very strange problem with MC7304. Randomly (like in 
1 of 3 instances), when initializing the WAN connection, the modem setup 
routine fails on the--wda-get-data-format command, and then the 
completion of the initialization just fails. For now, we have just been 
detecting this and then reset the usb port and rerun the whole procedure 
at regular intervals until it works, but that is not a permanent 
solution. The wda-set-data-format also fails when get does.

Have been googling 'lightly' without any obvious success. I was hoping 
some of you experts on this list just pops up and say 'you need to do 
this' before we start spending to much on digging very deeply into the 
issue :)

# qmicli -d /dev/cdc-wdm0 --wda-get-data-format
error: couldn't create client for the 'wda' service: QMI protocol error 
(3): 'Internal'

libqmi version: 1.22.2

kernel 4.9.199

MC7304 firmware:
Model: MC7304
         Boot version: SWI9X15C_05.05.78.00 r34310 CARMD-EV-FRMWR3 
2017/09/17 00:43:17
         AMSS version: SWI9X15C_05.05.78.00 r34310 CARMD-EV-FRMWR3 
2017/09/17 00:43:17
         SKU ID: 1103054
         Package ID: 
1103054_9906141_MC7304_05.05.66.00_00_Generic_005.000_000
         Carrier ID: 1
         Config version: 005.029_000

Any hints or advises appreciated.


BR,

Tor Rune Skoglund, trs at fourc.eu


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