Yo Alan! On Tue, 28 Aug 2012 14:56:49 -0400 (EDT) Alan Stern <[email protected]> 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
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
[email protected] Tel:+1(541)382-8588
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