Way to prevent MM from periodically reading packet stats

[Aleksander Morgado]

Hey,

> I have MM version 1.6.4  running on Linux and I am using it  to communicate
> with a Telit LE910 V2 over MBIM and AT.
>
> Along with MM I have running my own process that sends and receives AT
> commands over one of the serial interfaces (ttyACM0).
>
>   -------------------------
>
>   Hardware |   manufacturer: 'Generic'
>
>            |          model: 'MBIM [1BC7:0032]'
>
>            |       revision: '20.00.504'
>
>            |      supported: 'gsm-umts, lte'
>
>            |        current: 'gsm-umts, lte'
>
>   -------------------------
>
>   System   |         device:
> '/sys/devices/platform/soc/soc:internal-regs/d005e000.usb/usb1/1-1'
>
>            |        drivers: 'cdc_acm, cdc_mbim'
>
>            |         plugin: 'Generic'
>
>            |   primary port: 'cdc-wdm0'
>
>            |          ports: 'ttyACM3 (at), cdc-wdm0 (mbim), wwan0 (net)'
>
>
>
>
>
> Apparently MM fails reading packet statistics from the Modem and this
> happens periodically. I see the following error -
>
> ModemManager[1949]: <warn>  Reloading stats failed: OperationNotAllowed
>

This is handled in git master already, we just stop reloading stats if
we get that error once, see commit 95284506.

>
>
> I suspect that MM’s periodic stats request(assuming this is over MBIM) is
> interfering with my AT requests over ttyACM0, which fail occasionally (i.e I
> don’t get responses to AT commands send over ttyACM0 ocassionally).
>

I would very highly doubt that, but no idea without looking at Telit's firmware.

>
> I would like to know if there is a way to configure MM to prevent polling
> for stats and if it may interfere with using one of the serial ports
> independently of MM?
>

You could backport patch 95284506 to your version of MM, or just
update and use the 1.8-rc1 tag, which will be compatible with 1.6.x.

-- 
Aleksander
https://aleksander.es