Q. Hello, I have a Dell laptop and I just reinstalled Windows 7 Ultimate x64 64-bit clean install on it. Ever since that time I have an unknown device in device manager. It is called ACPI\SMO8800 and I do not know what the heck it is or how to even get it working/configured. I really need to know where I can download the right driver and any help is appreciated!!!
A. Here is the download link for the driver that should solve your ACPI\SMO8800 unknown device issue:
, Dell dl link
The driver is for your Dell laptop’s ST Microelectronics Free Fall Sensor, it is what shows up as Unknown Device ACPI\SMO8800
More details about free fall sensors:
That free-fall sensor is an accelerometer which can detect movement (i.e. 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.
IBM pioneered this technology in their ThinkPad line way back in 2003 and Dell has implemented it as well. Of course, it has applications beyond protection as even the Apple iPad/iPad 2/iPhones have an accelerometer which developers can use for games and other purposes!
PS I would like to thank you for your question, as I am a bit fan of the Latitude E series (and also the Dell Precision line). You have a nice laptop!
Affected Dell Laptops/Notebooks:
Latitude E6410 ATG
Latitude E6420 ATG
Latitude E6420 XFR
(and potentially more if you see an unknown device with Hardware ID ACPI\SMO8800)
Supported Operating systems:
Microsoft Windows 7 32-bit (x86)
Microsoft Windows 7 64-bit (x64)
Microsoft Windows Vista 32-bit (x86)
Microsoft Windows Vista 64-bit (x64)
Microsoft Windows XP (x86)
Microsoft Windows XP x64
More info on this topic:
IBM Research | People | Mark A. Smith | APShttp://www.almaden.ibm.com/cs/people/marksmith/tpaps.htmlAll of these systems use accelerometers placed on the motherboard to detect motion. A kernel software driver interfaces with the accelerometer and exposes its acceleration…
Accelerometer – Wikipedia, the free encyclopediahttp://en.wikipedia.org/wiki/AccelerometerAn accelerometer is a device that measures proper acceleration. This is not necessarily the same as the coordinate acceleration (change of velocity of the device in space), but…
Device manager properties page after the correct driver has been installed:
Code 28 on PCI bus
Driver functionality rated 5/5 stars (no problems and simple install) [starreview tpl=16]