Macbook screen switch off when moved

Question

When moving my macbook it sometimes switch off unexpectedly (black screen) and switch on again after several seconds.

I remember solving the problem several month ago by changing a internal MacOS X settings with such a command:

defaults write com.apple.??????

This command disabled the automatic shock detection system that prevent hard drive damage.

Does someone knows this command? a better alternative?

score 1 · Accepted Answer · edited Feb 08 '13 at 14:34

1

Disable the Sudden Motion Sensor to avoid the harddrive heads parking them due to loud noise in a club.

To check if Sudden Motion Sensor is activated, use the following command and look for the sms setting (1 = enabled) :

# sudo pmset -g

To disable Sudden Motion Sensor, use the following command :

# sudo pmset -a sms 0

To enable Sudden Motion Sensor, use the following command :

# sudo pmset -a sms 1

Hope this helps!

edited Feb 08 '13 at 14:34

Martin Delille

answered Feb 06 '13 at 10:17

Jamie Taylor

thank you for that but I have one question: what is the first line for : *sudo pmset -g* ? – Martin Delille Feb 08 '13 at 14:25
I found by myself : this is to check the current value. – Martin Delille Feb 08 '13 at 14:27
1

I edit your answer for further reading. – Martin Delille Feb 08 '13 at 14:30

1 Answers1