Greg KH <greg@...> writes: > > This sounds like you have a flaky connection with this usb port. Are > you sure it is providing enough power and there are good electrical > connections here? > > thanks, > > greg k-h > -- More information, I tried couple USB 1.1 full speed USB memory stick. And all full speed memory sticks work fine without any issues. Only USB2.0 high speed mode does not work. I am not sure if it is the power issue or host controller issue. If the speed is in high speed mode, how does it effect the downstream traffic to the USB flash or effect the USB storage driver? I know the high speed and full speed use different packet size to talk with the device. I doubt there is some speed mismatch in the code. The device and the host controller should have some handshake every some seconds. Is it possible that the speed will be down to full speed in that periodic handshake? Thanks. Regards Jimmy > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@... > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- 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
