Yo Alan! On Tue, 28 Aug 2012 14:56:49 -0400 (EDT) Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Tue, 28 Aug 2012, Gary E. Miller wrote: > > I am now getting a lot of these in my logs: > > ehci_hcd 0000:00:12.2: detected XactErr len 0/6 retry 28 > 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. OK, fair enough, but does it need to keep flooding my logs? Can we rate limit that a bit? > 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. I really doubt it is a hardware error since this appeared after the last kernel update. It may, or may not be related, but I am still getting failure when I plug a USB 1.1 device into a USB 3.0 hub: hub 8-2:1.0: state 7 ports 4 chg 0000 evt 0010 hub 8-2:1.0: port 4, status 0101, change 0001, 12 Mb/s hub 8-2:1.0: debounce: port 4: total 100ms stable 100ms status 0x101 usb 8-2.4: new full-speed USB device number 9 using xhci_hcd usb 8-2.4: ep0 maxpacket = 8 usb 8-2.4: Successful evaluate context command ehci_hcd 0000:00:12.2: detected XactErr len 0/6 retry 9 usb 8-2.4: skipped 10 descriptors after interface usb 8-2.4: skipped 2 descriptors after interface usb 8-2.4: skipped 1 descriptor after endpoint usb 8-2.4: skipped 2 descriptors after interface usb 8-2.4: skipped 1 descriptor after endpoint usb 8-2.4: skipped 1 descriptor after interface usb 8-2.4: default language 0x0409 usb 8-2.4: udev 9, busnum 8, minor = 904 usb 8-2.4: New USB device found, idVendor=0d8c, idProduct=0139 usb 8-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 8-2.4: Product: DYNEX USB Audio Device usb 8-2.4: Manufacturer: C-Media Electronics Inc. usb 8-2.4: usb_probe_device usb 8-2.4: configuration #1 chosen from 1 choice usb 8-2.4: Not enough bandwidth for new device state. usb 8-2.4: can't set config #1, error -28 Sarah was looking into that for me earlier. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701 gem@xxxxxxxxxx Tel:+1(541)382-8588
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