Hi all,
Am noticing odd behaviour on my MacBook Pro running Tahoe 26.4. I keep my screen brightness at 0%, however I am noticing several distinct anomalies:
1. Sometimes when I press FN-F1, Vo reports screen brightness at 6% after the first key-press, then 0% thereafter.
or
2. Screen brightness seems to auto-increase to 35-40%, without any intervention from me.
In other words: it does not remain at the 0% value at which I set it. Anyone else encountered this? Nothing is showing in System Settings which suggests an issue there.
Comments
Ambient light sensor
It will always change even if it is at 0%. Lower brightness to 0% and switch on screen curtain. This is how it won't change.
Isn't it true tone? I think
That changes brightness depending on the lighting around. And of course @Maldalain is right.
Truetone
Yes @TheBlindGuy07, I would have assumed that turning TrueTone off would solve it, but alas not. thanks @Maldalain, will give your suggestion a go.
The True Tone
The true tone is not about the brightness. It adapts the colours of the screen to adapt to your surroundings.
hitting this too
I have the exact same thing happening here, on my macbook neo, which lacks true tone capability.
I even unchecked the option in display setting to automatically adjust brightness, then lowered it to 0%. It still increase again seemingly at random.
Sounds like a definite bug to me.
Also screen curtin does not prevent brightness from rising, I can confirm as much because even with it enabled, it will move to 12% or more, sometimes 40%! It is visible in the display settings when it does that, also.
Very, very annoying, especially on lcd screens where the screen curtin doesn't mean a near 0 energy drain compared to oled.
re: Hitting this too
Hi,
Yep identical here. this is Apple though, so just to be clear: It's not a bug, just an unexpected feature.
iPhone
Also happens in iPhone, I believe is normal. Long live cats. PS. the brightness is adjusting to the day and night.
enable screen curtain turn brightness to zero
enable screen curtain turn brightness to zero does that solve the problem?
found fix
Hi,
I believe I've found a fix for this issue. Not sure if it will work on your side though. Seems to work on mine, that said.
Don't use fn+f1 or whatever to lower brightness back down to 0.
Instead, go in display settings, then right next to the slider for brightness and the buttons to reduce and increase brightness, you'll notice a switch button that says, automatically adjust brightness, or something along those lines. Toggle it off, if it is on, then lower the slider back to 0%. And then, reboot. Ever since I did this here, the brightness never moved from 0%. If your brightness is at 0%, the switch button will be dimmed and make you believe the function to automatically adjust brightness is off.
HTH