Am Donnerstag, 26. August 2010, 16:58:34 schrieb Alan Stern: > On Thu, 26 Aug 2010, Mohammed Amine IL Idrissi wrote: > > > From: Mohamed Amine IL Idrissi > > Sometimes, usb devices won't be powered off at shutdown. This change > > will make it power off. > > How do you know that the devices get powered off when the patch is > applied? The fact that an LED goes out does not mean the device is > powered off. For a rigorous test you should measure the voltage on the > USB bus. > > My guess is that the devices remain powered on either way. The > difference is that with the patch the device decides to suspend, so it > turns off the LED and uses less power -- but it still uses some power. Why would that be? If you stop SOF devices should suspend either way. 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
