iPhone 8 screen will not turn off automatically when not being used

This should work. It is more than a restart.

If it doesn't, you may have to perform a DFU and set up as a new phone. Make sure all your data is on your computer first so you can resync it on. DO NOT restore from a backup; it could bring the problem back.

I did ultrashock's fix on my phone and it worked. So far...it's been about a month.

(and if you don't know how to do a DFU on the iPhone 8, I assume you do know how to google "DFU iPhone 8". If not, well.....)

Actually no, but I solved the issue after installing the latest upd

Shutdown and restart worked for me as well.

Supposedly if you do the full reset the problem should go away permanently - I am reluctant to go through all that and believe Apple can do something so we all don't have to.

Contact them and ask. Apple does not reply to these posts. support.apple.com/iphone

Did this work for you? I have changed the settings as suggested, but still have the issue that the iPhone 8 will not auto-lock. I set it for 30 seconds, 1 minute, etc. Regardless of the time chosen, the iPhone will not auto-lock.

I have the same issue (iPhone 8Plus), have done a hard reset that fixed the issue temporarily but am having it again now.

it sometimes keeps the screen on, on the lock screen!

Second hard reset done, let's hope it works and that this issue is fixed in the next IOS update

I have had this issue since I got my iPhone 8.. I have restored it, reset it, lost everything, and hard reset it. I am very disappointed in Apple. I have done the hard restart and that seems to take care of it for a couple of weeks. Oh, also shut off the raise to wake; bummer for not being able to use yet another feature.

Same here and it started shortly after receiving it. The only way to get it to work again is a shutdown. The a few days later i notice its not auto-locking again.

Could it be an app running in the background that causes this and a restart clears it? May it works until the culprit app is opened again, starting the issue all over.

i am also facing the same problem,restarting the phone worked but this is not a permanent solution.with brand as big as apple the issue should be addressed by apple and should be solved in an update.it is very irritating to see the screen not turning off automatically so i request you to solve the problem in the latest update.

Same. I’ve changed settings and it will still stay on for hours unless I manually shut it off.

I have the same issue with my iphone 8. My setting was already set for 3 minutes and in the last 24 hours it no longer works. I have to manually shut the screen off. So settings is not the issue.

Mine is doing the same. I've changed all the different auto lock times, hard reset, and nothing works. I have to manually hit the lock button for the screen to turn off. Did you get yours fixed?

I’m now on 11.1 and so far so good. As you’ve said, it can take some time to reappear but fingers crossed it’s now sorted.

I am having the same problem. I have changed/tried all the auto-lock settings, and I tried shutting my phone off (which solved the problem for less than a week). This problem is quite a nuisance