On Fri, 15 Aug 2014, David Laight wrote: > With all the usb dynamic-debug enabled the first errors I see are 'detected XactErr' > len 0/1522 and len 2048/18944 (all 32 retries). > Then some '3strikes' messages (75 in total split between the endpoints). > > I've not yet looked at what those errors actually mean. "Detected XactErr" means a transaction error occurred (the Transaction Error (XactErr) bit was set in the qTD's status field). The len values are the number of bytes transferred and the number of bytes requested. Usually this occurs because the host doesn't receive a handshake or data packet from the device. The "3strikes" messages mean an URB was aborted because there were too many errors. 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
