On 2017-07-19 16:48, Kelvin wrote:

        If I'm not wrong qmi_wwan is trying to bind to interface 5, but
        rmnet
        is on 2 (that has been wrongly taken by option). Which kernel
        version
        are you using? Did you modify the source code of option and
        qmi_wwan?


    This does indeed look incorrect - the qmi_wwan.c modification on
    this kernel uses 5 but the LE910 documents say to use 2. Good catch,
    thanks!

1bc7:1201 needs special handling (set DTR) in the qmi_wwan driver so the fix is not as simple as just changing a 5 to a 2.
You will not get any reply on the qmi interface without that.

/Lars


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