problems with QMI dual stack connections from MM - works with qmicli
bjorn at mork.no
Tue Apr 27 18:16:09 UTC 2021
Reinhard Speyerer <rspmn at arcor.de> writes:
> from the observed behaviour AT+QMBNCFG="AutoSel",1 seems to have a similar
> semantics as the Sierra Wireless PRI "AUTO-SIM" feature discussed recently
> without the need for a device reboot. Depending on the IMSI and/or other
> properties of your SIM AT+CGDCONT entries may be created/overwritten
> and certain contexts e.g. for IMS may automatically be activated.
> Obtaining S1AP traces in the network or QCDM logs on the device and checking
> the NAS EPS signalling might be a good way to validate your assumption about
> the firmware vs APNs above.
> If that doesn't explain the effects observed at the QMI level you could try
> AT+QCFG="volte_disable",1 (if it is set to 0)
> power cycle the modem and check if anything changes.
Thanks! That made all the difference! OK, I should have just taken the
advice wrt these settings before. Why do they enable this by default?
It looks pretty broken.
"volte_disable" was set to 0. I guess that explains that "ims" thing?
So I never got around to the MBIM testing. But given these results, I
assume I would have had similar issues there. This appears to be a
Quectel specific configuration problem.
Well, back to testing MM without all the modem imposed confusion.
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