On Sun, Nov 29, 2009 at 2:04 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Sun, 29 Nov 2009, Jason Byrne wrote: > >> Attached is a usbmon dump of the bus with the attached device, with >> kernel 2.6.31.6, and ehci_hcd module loaded... >> >> I've also noticed that the kernel will attach this device successfully >> ~ 1/5 times, so it doesn't fail 100% of the time with ehci_hcd active. > > The usbmon trace shows lots and lots of low-level hardware errors. In > the absence of other evidence, I'd say that something is wrong with > either your computer's EHCI controller, the USB cable, or the drive's > USB interface. > > Do you have a comparable trace from a working kernel? Sigh, my fault for consuming all of the rear usb ports on this box, and pushing the limits of the front usb ports with the cradle. I've moved the usb cradle to the rear usb ports, and things seem to be perfectly reliable again... I apologize for the wasted time and effort :-/ -- 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
