Bjørn Mork [mailto:bjorn@xxxxxxx] [...] > Sorry, but then this makes even less sense. The active USB > configuration is user selectable and you should make any of > them work if > possible. Why can't the drivers figure out this at runtime? Excuse me. I have no idea about how to switch the configuration at the runtime ,and how to change the default configuration when a USB device is plugged. When a user select one of the configurations, he/she would wish to fix the configuration number after rebooting or after the dangle is unplugged and plugged again. For these reasons, this is the simple way which I could think. Maybe I choose the wrong method because I don't know how to satisfy the requests. May you provide me the relative information? Then, I could replace the current method. Thanks. Best Regards, Hayes -- 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