On Tue, 8 May 2012, Sergio Correia wrote: > the output from USBmon for both EHCI and xHCI is available at: > http://www.uece.net/misc/usb-headset-problem/usbmon-usb2-bus2-dev6.txt > http://www.uece.net/misc/usb-headset-problem/usbmon-usb3-bus3-dev5.txt It's notable that the bus-2 trace (which I presume is the one using EHCI) shows that even though each packet requested 96 bytes of data, the device sent only 88 or 90 bytes. By contrast, the bus-3 trace (xHCI) shows that each packet contained 96 bytes. We should expect the two traces not to differ in this way. This may be a bug in the xhci-hcd driver -- it may say it got more bytes than actually were received. 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
