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2,5 GHz Dual-Core Intel Core i5 Prozessor (Turbo Boost bis zu 3,1 GHz) mit 3 MB geteiltem L3 Cache.

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System woken go to sleep when I close the lid

I have the problem that when I close the lid it will not go to sleep at all.

In fact, if I put the computer to sleep and close the lid it will spring back to life. So, I don’t think my sensor is completely faulty. But, I do believe it is functioning backwards?

I also don’t completely understand your testing method. I would appreciate a more in-depth instruction.

Diese Frage beantworten Ich habe das gleiche Problem

Ist dies eine gute Frage?

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From what you described here I think you have a different problem!

The Hall sensor senses the magnet held in the lid so when you close the lid the sensor fires off, at which point the computer knows to turn off the display and the keyboard backlight.

The test is just emulating the lids magnet to make sure the sensor works as well as the magnet is in the correct location as some displays have the magnet in a different location so it won't meet up with the sensor!


Do you have any more thoughts as to what it could be? I asked reddit and someone suggested that my magnet polarity is reversed.


The Hall sensor only senses the magnetic flux it does not detect the fields direction.

How about posting a video so we can see clearly what you are encountering Bilder zu einer vorhandenen Frage hinzufügen


This is the video I attached to my reddit post earlier today. https://photos.app.goo.gl/5uxnHEwgDrLK6g...


@danj Hall sensor?


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@teakdamar - I moved your question too its own as you have a 2012 model

Do you replace your systems SSD? What did you put in?

Update (09/22/2020)

It does sound like your Hall sensor is messed up then. You’ll need to test it get a small rare earth magnet and a steel paper clip. You’ll also want a bit of masking tape (or Post-It note) to make a small pointer.

With the paperclip lets locate the magnet in the screens bezel face along the left side by sliding paperclip along. Once the paperclip is held by the lids magnet carefully fold the lid down and using masking tape marker transfer the location to the uppercase palm rest.

Now with the system running, slide the magnet slowly across the palm rest surface where you placed the marker. The display should turn off and when you go past the screen should wake up. Keep in mind the sensing area is about 8mm round.

Now to be clear, this is not instant! Did it react? If not, slide the magnet further to the front edge to see if the magnet was located in the wrong placement (the 2012 model has the magnet in a different location than the other models. If you locate it in a different place then your LCD panel was replaced and the person moved the magnet.

Hall sensor location:

Block Image

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It is the stock 128gb ssd. Running latest catalina.


Is that a rare earth magnet? A refrigerator magnet may not have enough magnetic flux to reach through the case to the sensor. If it is strong enough then the hall sensor is bad and will need replacing or you'll need a new logic board.


It doesn't account though for me closing the sleeping laptop and it waking up though


That is explainable! The iSight camera also effects things here as sees the light if you covered the lens with a dense light block that should change the reaction of the displays backlight..


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Emren Akdamar wird auf ewig dankbar sein.

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