Display on iPhone 8 won’t turn off.

I had the same issue. I usually leave my iPhone 8plus set for the 5 minute auto-lock interval, but it wouldn't dim or go to sleep or autolock for seemingly very long periods of time.

I ran your test above and it seems to be undergoing the auto-lock in most cases, but the timing as depicted within the auto-lock times seems to be off.

30 seconds: Dimmed much sooner and went to sleep prior to the passing of 30 seconds.

1 Minute: Almost the same as 30 seconds.

2 Minutes: Dimmed within 30 seconds and sleep by 1 minute.

3 Minutes: Dimmed in about 55 seconds and asleep within about 30 seconds later.

4 Minutes: Dimmed within 2 minutes and asleep inside 3.

5 Minutes: Dimmed at 2m10s, asleep at 2m30s.

In each case the Auto-Lock function worked and I needed to unlock it when I attempted to open it. But the timing wasn't as prescribed within the settings as listed above.

Also (and separate issues), I had to shut off the Raise to Wake functionality and also the Reduce Motion (changed to) ON. The Reduce Motion function seemed to be glitch and would lock up the phone momentarily (3-5 seconds) upon waking the phone.

That's my 240 cents (2007 initial iPhone dollars inflated to current US iPhone 8 Plus dollars, further reduced by the lackluster sales and thus diminishing worth of my brand new phone with the above flaws).

Humor aside, that is all...for now.

I see the same problem on an iPhone 8.

There is s similar thread on this topic here: https://discussions.apple.com/thread/8126843?answerId=32575415022#32575415022&ac_cid=tw123456#32575415

For me and some others it takes 2-14 days to reoccur after restarting your phone.

I have yet to confirm it in iOS 11.1.1 but earlier iOS versions had it (other users have reported it 11.1.1).

I don’t know if all users have come to this issue by restoring from another phone. I have - restoring from iOS 10.3.3 onto an iPhone 8.

Someone has said changing the lock screen background has cured their issue - I’m waiting to see if iOS 11.1.1 has cure it.

I have created an Apple radar however they need log files, so I’m waiting for the problem to ocurr.

If anyone can reproduce and add them to: https://bugreport.apple.com/web/?problemID=35503884

I am struggling with the same issue. I have done a hard reset, switched how many minutes I have set to and still it will stay on and not lock for hours. I have an 8 year old and I like to have my phone locked when it's not in use to save on battery life. When will this be resolved?

Hi

Try a reboot press the side down volume button quick then the side up volume button & the power button hold both down until you see apple logo.

Go to i books download ios 11 user guide & iPhone 8 guide both are free.

Cheers

Brian 🇬-1F1E7;

My problem is that a reboot fixes this issue temporarily. After a few days, it stops turning off the display and auto-locking. When I reboot again, it will again start turning off as intended in the settings, but ... again. Another few days, the issue comes up again.

I've had this same issue since day one, a reboot will often fix the issue for a short time but it doesn't last.is

I'm not sure how this made it through Quality Assurance considering this is a repeatable problem hundreds of people are having.

Please fix in your next software update!

I too have the same issue on my 8+. It wont turn off after the stipulated period and its draining my battery.

When this really works I get upto 4 days of battery life, but with this issue its down to 1 day.

I’m have g the same issue than most. I let my iPhone 8plus on mu desk and lock set to 30 sec. passes more than 3 minutos and no locking. I tried other times. Same thing.

No app open.

I have to remember to lock manually every time. Last night more than 2h until I wake up with the display light.

=/

So... not a si flex word from Apple?

I have had my new 8 plus for over a week and didn't have this problem. Then last night my new case arrived and I put it on. When I got up this morning I noticed that the screen never went to sleep. Now I've set the time to 30 seconds and it still didn't turn off. When I took off the case, the screen went to sleep as it should. The case is a Case-Mate 2 piece type. I'm wondering if the inner piece that hugs the border of the phone is setting off some sensor that makes the phone think it is still in use.

Same exact problem on iPhone X with the latest public update. I am using a case I purchased from Apple--the OtterBox Statement Series Case for iPhone X. Note that a reboot temporarily fixes the problem, but it happens again after usage.

I am having the same issue. I have already taken back my first Iphone 8plus and now on my second phone. After a week of using the screen will not go to sleep automatically. I sure hope this is resolved ASAP considering hundreds of dollars are spent on a phone that doesnt work. I have tried all possible fixes and it still does not sleep without manually putting to sleep. Apple please fix.

Any official response from Apple yet? My phone has forced security policy from Exchange, so can't try the following. Can someone try this solution from a similar problem in iOS 10?

1. Turn off passcode at Settings > Touch ID & Passcode > Turn Passcode Off.

2. Restart your device.

3. Turn on passcode at Settings > Touch ID & Passcode > Turn Passcode On. (Do not delete your saved finger prints.)

No several folks telling me same problem, but nothing from Apple! My supplier asked me to send back the phone for several fault reasons and is issuing me with a new one! the go to sleep issue seemed to solve itself.. (intermittently) one user said the case might be the issue

As the problem is temporarily fixed for 7-10 days after a reboot / firmware update, how can you be sure that 11.2 fixes it for good? How many days have you been running it for? I am having a huge fight with AppleCare about it, they claim it's probably a settings fault on my side and keep forcing me to reset the phone and install a clean iOS image which as all the other people report helps for a couple of days, until the problem reoccurs.