Re: [RFC PATCH] usb/acpi: Add support usb port power off mechanism for device fixed on the motherboard
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On 2012/5/16 22:39, Greg KH wrote:
When the port was powered off, the connect-change event will not be detected andOn Wed, May 16, 2012 at 10:36:02AM -0400, Alan Stern wrote:On Wed, 16 May 2012, Lan Tianyu wrote:Ok. Let me reconfirm the meaning of these opinions. "auto" if port without device, turn off power directly. if port with device, turn off power when the device is suspended. "on" the port's power must be on. "off" the port's power must be off. Right?Maybe the "auto" setting should be renamed "active". Then "auto" can be used for: If the port has a device, turn the power on. If the port doesn't have a device, turn the power off.And plugging a new device into a port that was powered off is going to cause the power to come back on, right?
we don't know a device was plugged in. :(
-- Best Regards Tianyu Lan linux kernel enabling team -- 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
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