I've noticed that sometimes when closing the lid, screen turns black, but right before the lid is closed, lights back up as if I opened the lid. Happens on different OSes and hasn't been fixed after SMC reset. https://youtu.be/BvB1kQzHAHk
MacBook Pro 16″, macOS 10.15
The mechanism that runs that is pretty simple. There is a magnetic reed switch in the body and a magnet somewhere on the display assembly.
If you bough DIRECT from Apple, you have a 14-day free exchange period (in the same country as purchase, except in Hong Kong and Singapore and maybe a few others in the Far East).
after the 14 days it would be a warranty Repair.
It may be doing a Power Nap.
Users have been complaining because (at this writing) there seem to be some outstanding bugs related to Power Nap, and it causes a kernel panic at waking. You may want to turn off that feature in Energy Saver.
Got it, thank you.
Mine is close to a month since I bought it (was thinking that's OS issue). Hope I'll be able to travel to the countries with official Apple Stores soon enough 😅
OOOh, did not see that little footnote.
thanks for that, I stand corrected!
It happens under macOS Catalina, macOS Big Sur, Windows 10, and even on the OS selection screen (when on boot you need to hold Alt)
Tried turning it off - the same result.
As you can see on the video, screen turns black too early. It looks like for some reason sensor responsible for lid closed detection is calibrated incorrectly. Basically, screen turns back on when for sensor it looks like screen went through the keyboard and opens on the other side.
you can manually put your Mac to sleep with:
Command+Option+Power-button
-- just don't hold it too long -- that would do an uncontrolled power-off
then press any key to wake.
This shortcut doesn't apply to the TouchID Macs :)
https://support.apple.com/en-us/HT201236
I have corner of the screen assigned to sleep. But that's a bit frustrating anyway..
Lid closed sensor doesn't work as expected
