On Mon, 18 Mar 2013, Bruce Guenter wrote: > On Mon, Mar 11, 2013 at 02:48:50PM -0400, Alan Stern wrote: > > Okay; if it happens again, collect the information and we'll go on from > > there. > > Well, it's happened again, but it's obviously not a boot issue. > Something happens after boot that is causing some errors. Complete > dmesg attached. Either the EHCI controller, the USB connection, or the device itself is unreliable. The log shows a large number of resets at various times. Search for lines matching usb 2-3: reset high-speed USB device number 2 using ehci-pci and you'll see. Finally, at timestamp 20673 a series of reset attempts ended in failure. That's when the device was re-detected on the OHCI controller. If you want to find out what caused those resets, capture a usbmon trace for bus 2. It may provide a clue. 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
