On Fri, Jan 02, 2009 at 11:04:40AM -0500, Alan Stern wrote: > > Now I know 3 methods supposed can be used to shut the device: > > 1. (Alan Stern said Windows use this) cut the USB port's power > > I said no such thing! In fact, I said exactly the opposite: Windows > does _not_ cut the port's power. Instead it disables the port. Sorry, my mistake. > The best approach is to send a SYNCHRONIZE CACHE command followed by > START-STOP (if the device supports it), and then to disable or suspend > the port. In Linux, those two commands will be sent automatically if > you unbind the device from usb-storage. The suspend has to be done > manually unless you have set up a udev rule (or something equivalent) > to enable autosuspend for the device. Of course, this requires > CONFIG_USB_SUSPEND. Quite clear, thanks. -- Li, Yan -- 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
