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Question: iPhone X screen dims randomly

My iPhone X Screen dims on its own For about 10-15 minutes Then gets brighter again All on its own! I do not have auto brightness on I do not have tutone on I have no settings on that would affect the screen it’s very annoying paying $1200 for a phone and this is happening. I love Apple have every single product they make.

ANY THOUGHTS ON WHATS CAUSING THIS?

Thanks!


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Feb 2, 2018 9:13 PM in response to AnthonyAllstate In response to AnthonyAllstate

I have been having this issue also. I have noticed it more while testing an app that is currently under development. It seems to happen when the phone has been under a considerable load. While debugging - I can see the energy usage of the app is very high. After some time the phone begins to heat up. While looking into this, I found another thread that said it was because of heat. I am tending to think this is probably right. After the phone cools off it seems to go back to normal.

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Dec 12, 2017 9:23 PM in response to AnthonyAllstate In response to AnthonyAllstate

If that happened to me and you're sure all brightness settings are correct, I would reset the iPhone as follows:


  • Briefly press and release the volume up button.
  • Briefly press and release the volume down button.
  • Press and hold the side button until the Apple logo appears.


If that does not solve it, visit an Apple Store or Authorized Apple Service Center. Your iPhone is warrantied if this is caused by some manufacturing issue.

Dec 12, 2017 9:23 PM

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Feb 1, 2018 11:06 AM in response to Dale7832 In response to Dale7832

I have the same issue. I have the X 2 weeks and has happened twice. All power save settings are off. I only have True Tone on. First time it happened a week ago, I rebooted and it was fixed. The second time full brightness came back after a minute so I didn’t have time to react, I only checked my settings and all where off. When it dims it’s like it’s on 70% brightness. This has previously happened several times on my iPhone 6 and was always fixed after a restart.

Feb 1, 2018 11:06 AM

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Question marked as Helpful

Feb 2, 2018 9:13 PM in response to AnthonyAllstate In response to AnthonyAllstate

I have been having this issue also. I have noticed it more while testing an app that is currently under development. It seems to happen when the phone has been under a considerable load. While debugging - I can see the energy usage of the app is very high. After some time the phone begins to heat up. While looking into this, I found another thread that said it was because of heat. I am tending to think this is probably right. After the phone cools off it seems to go back to normal.

Feb 2, 2018 9:13 PM

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Mar 8, 2018 11:17 AM in response to sberman In response to sberman

My iPhone X dims on its own even when the auto dim settings are off. I brought the phone to the Apple store, they ran some diagnostic, it came up clear of issues and they even reset it. I still have the problem. On top of that, if I’m in iMessage and I type quickly the iMessage app will close and a random app will pop open. There’s no rhyme or reason.

Mar 8, 2018 11:17 AM

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Mar 12, 2018 8:20 AM in response to AnthonyAllstate In response to AnthonyAllstate

Same issue here. Mine only occurs if I am using it as GPS running Waze. It starts off nice and bright and after an undetermined amount of time the screen looks like it is about 1/4 of the way bright. When I check the brightness toggle it is all the way up.


If I turn the phone off then back on it resolves it. The phone does seem somewhat warm.


As others stated it’s likely a heat issue which stinks because my old iPhones never had the issue. Only noticed it after I got the X.

Mar 12, 2018 8:20 AM

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Mar 18, 2018 5:09 PM in response to JetLawFL In response to JetLawFL

Now I’m not too sure it is a heat issue. I was driving today, using Waze and like clockwork the screen dimmed. I quit Waze and after a few minutes the screen was back to normal. I used Waze again and after like 2 minutes screen dims.


So I launched Apple Maps and no screen dimming. I had Apple Maps running for maybe 10 minutes all good. I switch to Waze and within 2 minutes screen dimmed.


At least for me it’s only when I run Waze. Now it could be iOS 11 feels Waze is making the phone hot and dims the screen to protect it?


Another thing I found was my wife who has an iPhone 6, her screen will do the same but she is using Safari to read books. She too is running iOS 11.2.6


So maybe it’s a bug in iOS thinking the phone is getting hot when in reality it isn’t?

Mar 18, 2018 5:09 PM

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Mar 19, 2018 8:32 AM in response to panchososa694 In response to panchososa694

This is not an Attention Aware issue. Yesterday my phone was dimming on its own yet again while outside and I was standing next to my partner who’s phone was not dimming. We have identical settings regarding Attention Aware and we both have any potential auto dimming turned off. My screen, even at its brightest, isn’t crisp and white like his. Additionally, the phone will freeze for no apparent reason so I took my iPhone X into the Apple Store and they ran a diagnostic test and found nothing wrong, yet there most definitely is something wrong. It was a huge waste of time and quite frustrating considering the price of this phone.

Mar 19, 2018 8:32 AM

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Question: iPhone X screen dims randomly