iPhone XS Max XS Max brightness issues

[joshen]

Hi everyone,

In the past few days I noticed that the brightness of my iPhone XS Max randomly goes down to around 50% on its own, and returns to normal a while later. It stays like that even when I move the slider to anywhere above 50%. Auto-brightness is turned off.

Another issue I also noticed happening once was a major color shift. The dark greys in apps like YouTube and Reddit (dark mode), suddenly became a lot lighter in color. That issue was fixed after rebooting the device and hasn’t happened again since.

Could it be a software issue? Has it been happening to anyone else?

 

[chabig]

Has it been happening to anyone else?

I don't know know enough people with iPhone Xs to answer that.

 

[jermy4]

The brightness limitation is due to the temperature of the phone. It limits the brightness above a certain temp. Your other issue I have no idea.

 

[joshen]

The brightness limitation is due to the temperature of the phone. It limits the brightness above a certain temp. Your other issue I have no idea.

Oh very interesting! It usually happens when I’m outdoors in hot weather with brightness set at 100%, so it makes sense.

 

[simplynando]

I really hate this. It always does this to me. I live in Las Vegas and it's hot all the time. So as soon as I step outside and use my phone the brightness drops down to 50% and I hate it. It makes using my phone outdoors really hard. haha. But I finally figured out that it is related to the temp of the phone because once i'm inside for a while it slowly goes up to like 75% and then finally back up to 100% eventually.

 

[Newtons Apple]

Oh very interesting! It usually happens when I’m outdoors in hot weather with brightness set at 100%, so it makes sense.

I have not had mine dim but one time and it was near 100 degrees while outside. I had the brightness turned up so I could see and then noticed the screen dimmed. I had arrived back at the SUV so that was the end of it.

 

[alpi123]

This happens to me when I'm indoors and it's not that hot lol

 

[Jetcat3]

The Xs Max with an all white background pulls 4.2 watts at max brightness yielding 660 nits.

An 8 Plus is at 1.5 watts with 550 nits of brightness. The AMOLED panel on the Xs Max amazing uses 2.8 times more energy at max brightness and an all white background.

 

[compwiz1202]

Oh very interesting! It usually happens when I’m outdoors in hot weather with brightness set at 100%, so it makes sense.

Same happens with mine. I get the science but it is counterproductive. The one time I need full brightness is when the sun is shining bright.