iPhone X iPhone X with iOS 12 never sleeps

mrochester

macrumors 68020
Original poster
Feb 8, 2009
2,125
476
Hi all

I've just spotted today that my iPhone X with iOS 12 will not sleep. After a delay, the screen will dim as it does before usually going to sleep, but moments later the screen will light up full brightness again, and it goes around and around like this without ever going to sleep or locking.

I've tried restarting the phone, which has made no difference.

Does anyone know what the problem might be?

Many thanks

M.
 

AbSoluTc

macrumors 601
Sep 21, 2008
4,402
2,739
Hi all

I've just spotted today that my iPhone X with iOS 12 will not sleep. After a delay, the screen will dim as it does before usually going to sleep, but moments later the screen will light up full brightness again, and it goes around and around like this without ever going to sleep or locking.

I've tried restarting the phone, which has made no difference.

Does anyone know what the problem might be?

Many thanks

M.

There was a bug that reset the auto lock. Put it back to whatever time you want. Mine did that a few times on 11.

Settings - Display and Brightness -> Auto Lock
 
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