> Ah, I see the reason for your confusion. > > On USB buses, Wireshark captures URBs, not packets. An URB can contain > multiple packets. In this case, there was a single URB containing two > data packets. Each packet was 64 bytes, and the URB was 128 bytes. Ok Alan. Now that is clear for me. I am looking like crazy on the usbmon data. But no error is popping up in my eyes. I get no status message back except 0 and -2. And both are what I would expect. Other status message like -115 just popping up in SUBMISSION but this is normal. The only thing what I can think there is a HW-bug in Intel EHCI-part. At NEC controller everything is going fine for hours I fear without a real USB analyzer I will be not able to see any stuff that would help me. I even cannot see any ACK/NAK and something like that in usbmon. Does my log means it has nothing to do with kernel itself ?
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