true tone going nuts

stevemiller

macrumors 68000
Original poster
Oct 27, 2008
1,742
1,169
2018 macbook pro. is anyone else's true-tone display developed an issue of rapidly flickering between hues? it's definitely true tone because turning it off stops the flicker.
 

jav6454

macrumors P6
Nov 14, 2007
16,876
1,532
1 Geostationary Tower Plaza
Define "going nuts". Do you have like a video or picture? In any case, if you believe your True Tone is having a fit, take it to an Apple Store to have it serviced under warranty.
 

javisan

macrumors 6502
Dec 4, 2006
260
180
Chicago, IL
2018 macbook pro. is anyone else's true-tone display developed an issue of rapidly flickering between hues? it's definitely true tone because turning it off stops the flicker.
Yes! My 2018 MacBook Pro is also doing this. I first noticed about 7-10 days ago. It mostly happens in the morning when the sun is rising or in the afternoon during sunset, but this does not excuse it, this was NOT a problem when I bought it. The issue was sudden and very recent.

Glad to find it's not just me and I'm not going crazy. My plan is to record clips of the issue and then go to the genius bar.
 

stevemiller

macrumors 68000
Original poster
Oct 27, 2008
1,742
1,169
Yes! My 2018 MacBook Pro is also doing this. I first noticed about 7-10 days ago. It mostly happens in the morning when the sun is rising or in the afternoon during sunset, but this does not excuse it, this was NOT a problem when I bought it. The issue was sudden and very recent.

Glad to find it's not just me and I'm not going crazy. My plan is to record clips of the issue and then go to the genius bar.
interesting because it started in the last few weeks for me too. i'm currently on 10.14.6, and i can't remember when that update dropped, but i wonder if it's tied to that at all.
 
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javisan

macrumors 6502
Dec 4, 2006
260
180
Chicago, IL
interesting because it started in the last few weeks for me too. i'm currently on 10.14.6, and i can't remember when that update dropped, but i wonder if it's tied to that at all.
Could be, i'm also at 10.14.6.

I'll share a video as soon as I have one available.
 

chrizzz09

macrumors regular
May 18, 2013
234
178
Germany
To my MBP 2018 as well, especially when outside brightness changes, like the sun is shining, but then gets covered by clouds, the true tone changes hues too extreme to blue-/green-ish hue then to red-ish hue.
 

justinf77

macrumors 6502
May 18, 2003
449
299
This happens on my 2018 MBP as well, and only recently. Glad I’m not the only one! Hopefully will get resolved soon.
 

SeeGeeAitch

macrumors member
Aug 12, 2019
49
8
Australia
Just bought 2019 MBP - I'm getting this too - turning of True Tone seems to stop it. Only happens when I have the room lights dimmed and the tv on in the evening.
I'm guessing the light sensor picks up on the brightness increasing and decreasing from the tv and so the True Tone tries to adjust.....
 

james948

macrumors 6502
Nov 17, 2004
372
39
Yep. Me too. I've turned display brightness and True Tone off. Hopefully there'll be a fix soon but I'm very relieved it's not hardware related (brand new 16")
 

flemmingdjensen

macrumors member
Nov 30, 2017
35
14
Denmark
Yep same here on my new MBP 16" I9...

Sometimes I see colortemperature flickering

And the last two times I have woken the computer up from sleep a new strange thing happened:

The display wakes up with very little contrast - like you put the brightness control to max and contrast to minimum... When this happens - I am able to go into System settings / Display and switch Truetone off and then on - and the normal contrast and colors are correct again...

Must be software related so hoping for a fix in the next Catalina release .
 
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CLASSIC MUSCLE

macrumors member
Jun 16, 2012
40
0
I am also having this issue on MBP 16" I9. My office has a window, and in the afternoon/morning True Tone is really overreacting to slight changes outside or something. The exterior brightness doesn't seem to be changing to me, but all the sudden True Tone will "flicker" to a new screen contrast and it's very obvious and extreme when it does it. Seems the sensor for True Tone is a little too sensitive and is overreacting. I do not experience the issue when it's dark outside, and subsequently the light stays constant in the room.
 

joshwaah

macrumors newbie
Jan 20, 2020
1
0
Yep same here on my new MBP 16" I9...

Sometimes I see colortemperature flickering

And the last two times I have woken the computer up from sleep a new strange thing happened:

The display wakes up with very little contrast - like you put the brightness control to max and contrast to minimum... When this happens - I am able to go into System settings / Display and switch Truetone off and then on - and the normal contrast and colors are correct again...

Must be software related so hoping for a fix in the next Catalina release .
Ditto x2!
1. Both my previous 2019 13" TB and current 16" would flicker colour temperature, and
2. I have just now experienced the low contrast issue for the first time and toggled True Tone to fix it

Bonus round: When I wake my 16" MBP after letting it go to sleep with a monitor connected, the monitor remains off and the laptop screen flickers on and off sort of like when you connect a TV and it is (I assume) negotiating capabilities/calibrating. It does this ad-infinitum when ever the monitor is connected but the laptop screen does work fine if you disconnect the monitor. I have to reset the laptop in order to reconnect the monitor. I haven't bothered to dig into this one so for the moment I get around the issue by running caffeinate before stepping away from my desk.
 

stevemiller

macrumors 68000
Original poster
Oct 27, 2008
1,742
1,169
Ditto x2!
1. Both my previous 2019 13" TB and current 16" would flicker colour temperature, and
2. I have just now experienced the low contrast issue for the first time and toggled True Tone to fix it

Bonus round: When I wake my 16" MBP after letting it go to sleep with a monitor connected, the monitor remains off and the laptop screen flickers on and off sort of like when you connect a TV and it is (I assume) negotiating capabilities/calibrating. It does this ad-infinitum when ever the monitor is connected but the laptop screen does work fine if you disconnect the monitor. I have to reset the laptop in order to reconnect the monitor. I haven't bothered to dig into this one so for the moment I get around the issue by running caffeinate before stepping away from my desk.
i had the contrast issue as well. it was also resolved by turning true tone off, which i've now been doing for months. it kinda sucks that these laptops were shipped with features that were so messily implemented they basically have to be turned off.
 

james948

macrumors 6502
Nov 17, 2004
372
39
I thought it was fixed with an update but it's not. I've had to keep True Tone off too. Such a shame.
 

CLASSIC MUSCLE

macrumors member
Jun 16, 2012
40
0
Is anyone else still having this issue? My True Tone on 16 inch MBP is "adjusting" itself like every 2-5 minutes while I''m using the machine. Sometimes it will go longer, but sometimes I get these "blue screen flickers" that are extreme changes and it's only been 5 minutes since the last one occurred? Surely the light in my room isn't changing that much to need an adjustment every 5 minutes like this. Do I have a defective machine? Could being hooked up to an LG 4K external monitor be affecting this? Very annoying to spend $4K on a premium machine and have this screen flickering constantly distracting me. Yes, I could turn True Tone off, but should I really have to do that on a $4K machine or should it work as designed and advertised?
 

me55

macrumors member
Jul 26, 2019
81
19
Mine once started to shift the color temperature quite quickly for no reason, but there's a terminal command to reset True Tone:
Code:
sudo pmset resetdisplayambientparams
Restarted the computer afterwards and never had the issue again afterwards.
 
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sdp77

macrumors member
Nov 10, 2019
98
29
I have the same issue. My problem is that I don't know how to use Terminal. I opened it and there are two or three lines already. If I hit Enter, the last line gets duplicated.
 

sdp77

macrumors member
Nov 10, 2019
98
29
At first it seemed that 10.15.5 has solved the issue... for two days. It happened again several times while playing a game.
I have figured out how to use Terminal and, finally, introduced the command. Being hopeful.
 

RC-180

macrumors newbie
Dec 31, 2011
17
14
MBP 13" 2020 (10.15.5)--the issue came back after a day, despite using the terminal command. Random, sudden changing from warm to cool display, and the tone looks the same whether TrueTone is enabled or disabled.
Resetting NVRAM doesn't work either.
Guess I'll be waiting until the next software update.
 

Radavis

macrumors newbie
Nov 18, 2013
2
0
This is happening to me as well. Brand new MacBook Pro 16". At certain times of the day the True Tone starts switching back and forth from warm to cool. Not sure if I should take my machine in for replacement or not. Glad to know there are others experiencing this as well.
 

sdp77

macrumors member
Nov 10, 2019
98
29
Try the code mentioned in this thread. I haven't had a problem since I entered it. Make sure you reboot afterwards.
 
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