On Thu, 13 Feb 2014, Kasberger Andreas wrote: > > 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 ? Maybe you're experiencing a problem with link power management. Some changes were just merged into Greg KH's development tree (the usb-linus branch), and they should appear in the next 3.14-rc release. You could try either one of those. Or you could try building a kernel without CONFIG_PM_RUNTIME, which will disable link power management. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
