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USB Identity morphing does not work in WIN8.1 RRS feed

  • Question

  • I have faced an issue that the USB identify morphing does not work in WIN8.1, the reproducing steps are as below:

    1.Firstly there is one USB WWAN device with MBIM only USB configuration which is working fine in the WIN8.1 system

    2.Then updating the device to a new USB configuration which supporting morphing, that is, the device have 2 configurations but with same PID and expects system will select No. 2 configuration according to the identiy morphing spec.

    3.Then after updating, we found it can not work, the system selected No.1 configuration not as expected.

    After the issue happened, we then unstall the device drivers from the device manager, and then triggered a new device re-scan, then the issue is gone and morphing worked fine. Seems there are some information reserved in the registry for the same PID had taked bad effection on enumeration of the new configuration.

    Can anybody help me?

    Monday, May 23, 2016 11:22 AM