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why device keep enumerating ? RRS feed

  • Question

  • Hi Expert:

    We have a USB touch device and a filter driver for it; once the driver is loaded, the device keep enumerating. What could be the cause? Is the host (Win7) missing some necessary info about the device and did not get it? Any clues is appreciated. One clue is that once USBLyzer is started, the endless enumerating stops right away so I could not get the USB trace of the device in its abnormal state.

    Thanks in advance


    leo


    • Edited by SJ-Hills Thursday, July 9, 2015 4:53 AM
    Thursday, July 9, 2015 4:17 AM

All replies

  • how are you detecting the device is coming and going? device arrival/removal sounds? do you have a debugger attached? you should get a usb ETW trace, do not introduce a new variable like USBLyzer.

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    Thursday, July 9, 2015 5:19 AM