![]() IBM pioneered this technology in their ThinkPad line way back in 2003 and Dell has implemented it as well. downward acceleration or falling) and using that sensor your laptop can take steps to protect itself by parking the hard drive heads or other measure. That free-fall sensor is an accelerometer which can detect movement (i.e. NOTE: The driver is for your Dell laptop’s ST Microelectronics Free Fall Sensor (accelerometer), it is what shows up as Unknown Device ACPI\SMO8800 ? More details about free fall sensors: ![]() Here are the download links for the driver that should solve your ACPI\SMO8800 Unknown Device issue : Now I have an unknown device ‘ACPI\SMO8800’ in device manager. Hello, I have a Dell laptop and I just reinstalled Windows 7 Ultimate 圆4 on it.
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