On Tue, 28 Aug 2012, Gary E. Miller wrote: > Yo USB folks! > > I have the latest kernel 3.5.3. The xHCI patches seem to be helping, I'll > report back later on that after more testing. > > I am now getting a lot of these in my logs: > > ehci_hcd 0000:00:12.2: detected XactErr len 0/6 retry 28 > ehci_hcd 0000:00:12.2: detected XactErr len 0/6 retry 29 > ehci_hcd 0000:00:12.2: detected XactErr len 0/6 retry 30 > ehci_hcd 0000:00:12.2: detected XactErr len 0/6 retry 31 > ehci_hcd 0000:00:12.2: devpath 5.6 ep1in 3strikes > usb 1-5.6: unlink qh8-0e01/ffff8804292e2340 start 7 [1/2 us] > ehci_hcd 0000:00:12.2: reused qh ffff8804292e2340 schedule > usb 1-5.6: link qh8-0e01/ffff8804292e2340 start 7 [1/2 us] > > Does that mean anything? Should I care? I'm happy to provide more info > on request. They mean that the computer was unable to communicate with a USB device; it expected to send or receive 6 bytes of data but got no response -- not even an acknowledgment. The two most likely causes are hardware problems (cable issues or noise) or firmware bugs in the device. If everything continues to work okay in spite of the errors then you don't have to worry about them, although you might try replacing a USB cable. 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
