I've already tried VoodooHDA, but it sounds really weird. I prefer to use the USB output for now ... that is until we get a solution.

Just for info: I can properly Reboot/Shutdown.

My model is: K50IN-SX176C
flip360, may be, your model is different from mine. That is why you can get the VoodooBattery to work, because I also tried it in 64-bit but it didn't work properly.

It has been bought in France, so the Keyboard is AZERTY.