Hi everyone, recently the Sudden Motion Sensor on my Macbook stopped to work. In the System Profiler, there's this line: Sudden Motion Sensor: Disabled Weird, eh? I tryed the following in Terminal: pmset -g here is what showed up: Active Profiles: Battery Power -1 AC Power -1* Currently in use: womp 1 sms 1 hibernatefile /var/vm/sleepimage acwake 0 sleep 0 autorestart 0 halfdim 1 hibernatemode 3 disksleep 10 displaysleep 20 lidwake 1 As you can see, it says that the SMS is turned on... I tryed to change its value to "0" and back to "1" with: sudo pmset -a sms 0 pmset -g sudo pmset -a sms 1 pmset -g I even tryed to set it to "0" then to reboot, put it back to "1", reboot and so on, it still shows up as "Disabled" in system profiler. I tryed many applications that works with the SMS and none of them works (They used to). If I load AMSTracker in Terminal, the SMS values are always the same (It doesn't detect any motion). I tryed to reset the PRAM & the PMU : no results ; I tryed to apply the combo 10.4.7 Intel update : no results. I thought that maybe the sensor was "stuck" so I turned the Macbook off, closed the lid and shaked it like hell to see what happens, no results neither. Anyone have an idea of what's going on? Should I call Apple? Reinstall OS X? I can't take it back to an Apple Store as the nearest Apple Store is about 500 miles from where I am (Canada, Quebec). Any idea?