On Fri, 10 Jul 2015, Raphael Hertzog wrote: > On Fri, 10 Jul 2015, Alan Stern wrote: > > This suggests a new test you can run. Do the same thing as the > > unbind-rebind test before, but after the rebind, run "lsusb -v" (as > > root) while the trace is still being collected. Let's see what the > > lsusb output and the trace output show. > > Both traces are attached. The lsusb output doesn't show any device > detected. > > This is all done after a reboot to be in the situation where the disk > enclosure is not detected at all. The results are pretty clear. There is no indication that the disk drive is connected to the USB bus. This appears to be a peculiarity of the drive; evidently it doesn't like to be reset. Have you tried using the drive with a different computer? Or a computer running Windows or OS-X? Alan Stern P.S.: I've got some USB drives that show similar behavior. They don't work right except immediately following a power cycle. In fact, even if I turn the drive power on with the USB cable unplugged, and then plug in the cable afterward, they still don't work! The symptoms don't seem to be exactly the same as what you observe -- I do get a connect indication, but the drives don't reset as they should. Nevertheless, it is annoying and there doesn't seem to be any way around the problem. -- 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
