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

One week since last hard restart and it happened again over night. Don't think it had anything to do with an app being opened - did not use any apps last night. Please Apple - you are making me regret trading in my 6 for this 8 - never happened with my iPhone 6 - ever.

Agreed I gave my 6 to my wife when I got my 8. The 6 had been the perfect phone for me which is why for the first time since the 3G I had not upgraded after 2 years of owning. I nearly bought another 6 but thought the faster internals must be better.

Now I have to not forget to push the power button before ending my session every time most annoying.

I wish I could have bought the iphone 6 again. This issue is tedious and makes the battery go within a couple hours. I reset it and that worked for a week and a bit, but now the issue is the same. Resetting is a pain in the neck - I have to reenter all the wifi info, and repersonalize the phone.

Please fix this in your next update.

I totally agree - never had this problem with my iphone 6. I just spoke with support today and they wanted me to reset to factory settings. That puts all the onus on the customer - I lose photos every time that for some reason don't get backed up properly - complete hassle. They need to fix this on their end instead of expecting customers to do all the work to restore their phones in the hope it will fix the software problem. Really disappointed in all this.

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.

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.....)

I recently ran the latest iOS update, went in and changed my auto logout time, did a hard shutdown and ive had quite a few days without the issue. I’m going to do another hard shutdown and mark my calendar to see how long it works this time.

Has anyone seen these instruction? Ive been doing the press and hold sleep/wake button until i see the slide button to restart it. I just tried this and it went straight to rebooting, so rather handy.

How to force restart iPhone 8

To force restart (hard reset) the iPhone 8, press and release the Volume Up button, press and release the Volume Down button, and press and hold the Side button until your device reboots, then release. All three button presses should be done in relatively quick succession. After holding the Side button for about ten seconds, the iPhone will force restart.

Interesting - for my wife’s phone I did the same, changed the lock time and applied the 11.1.1 update and it’s been 2 weeks now problem free (however it took a few weeks to reoccur before). Another week and I may be able to declare it solved.

It's been about 2 weeks since I applied the 11.1.2 update and have had no problems with auto-lock - HOWEVER - this morning I could not get email or the text feature to respond without shutting down my phone and restarting. This is new - why why why 😟.

I too have found that 11.1.2 seems to have sorted the problem as it’s been 2+ weeks on the phone as well.

For this having problems, ensure you install that and also set the timeout value again (possibly to a different value initially- as that’s what I did).

@nstovell - no need to reboot phone - just terminate the apps with a problem. Not perfect but a bit quicker than reboot.

Can confirm this does not resolve the issue. I’ve also tried resetting to factory and powering on off (other recommended solutions). Still doesn’t go to sleep. Results of Apple using garbage components for greater profit and trash software to match. Thx guyz. Edit: I am up to date on software release, something I normally avoid because all these updates do is bog down my phone further. But I have updated to try to resolve.

Same here, even in low power mode it doesn’t dim the screen at all. I have my brightness low as it is, but still. My phones only 2 weeks old but as I don’t have insurance on it, I doubt I could get a replacement.

I don’t use auto lock, but wen my phone is locked, and I get a notification, the screen stays awake.

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.