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maikm23

macrumors newbie
Original poster
Sep 7, 2018
3
0
Germany
Hi all,

when the afternoon sun shined on my display a few days ago, I noticed the contrast being reduced. Blacks became light greys. It's reproducible by holding an iPhone's LED to the sensor next to the facetime camera. I also was able to reproduce this with a stock MBP 2018 in an Apple Store, so a hardware defect is unlikely.

True Tone is off, and changing that has no effect.

Can anyone else please try this?

I'm attaching a few screenshots (made with an external camera pointing to the screen, because macOS-made screenshots don't show this effect, blacks are still black there). Compare the blacks in the image with the color of the display's bezels.

Maik

P.S. rdar://44141305
 

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maflynn

macrumors Haswell
May 3, 2009
73,575
43,560
Is your "Automatically adjust brightness" checked or cleared?
 

maikm23

macrumors newbie
Original poster
Sep 7, 2018
3
0
Germany
Is your "Automatically adjust brightness" checked or cleared?

Cleared, and checking it also doesn‘t make a difference. The overall screen brightness stays the same. Only the contrast is reduced. Bright colors stay around the same brightness, but dark colors become bright too.
 

Wiscosity

macrumors newbie
Feb 23, 2019
1
0
Cleared, and checking it also doesn‘t make a difference. The overall screen brightness stays the same. Only the contrast is reduced. Bright colors stay around the same brightness, but dark colors become bright too.

I have the exact same problem, did a bug report to Apple but they didn't get the problem...
It's still there with the latest software update. I wonder if this is a general problem or limited to certain Macs?
 

maikm23

macrumors newbie
Original poster
Sep 7, 2018
3
0
Germany
I have the exact same problem, did a bug report to Apple but they didn't get the problem...
It's still there with the latest software update. I wonder if this is a general problem or limited to certain Macs?

The problem somehow disappeared for me through one of the last updates. Can't tell which one it was.
 

Ron21

macrumors 6502a
Sep 6, 2007
951
708
Same here, I noticed this 'bug' last year after getting my 2018MBP but can no longer reproduce it. They must have fixed it in one of the updates.
 

appleuser181

macrumors member
Aug 20, 2018
57
11
Canada
Hey guys, I noticed this same exact issue recently and I am running the latest macOS (10.14.6).
Is there a way to fix this?

P.S both "true tone" & "auto brightness" are enabled in display settings and I'm using a 15" MBP (2018)

Thanks in advance!
 

f0ma

macrumors newbie
Oct 4, 2019
3
0
This is totally intentional. It's a feature that increases gamma to make screen readable under bright sunlight.
 
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