Hi, I am looking at a device that spontaneously switches its mode. I guess that you need to actively do something that some Windows versions do to keep the device in its initial mode. The device contains an SD card reader. That leaves me in a predicament. The medium if it is mounted before the device switches will be dirty. Normally we say that unmounting before you switch is a responsibility of user space. But this device switches by itself. In that particular case I would go as far as make the storage driver refuse the storage interface of the initial mode. What do you think? Regards Oliver -- 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