Had same problem. I believe the adaptive brightness auto adjust it to zero light.
I use another phone flash light and direct it on the the front camera and light sensor. Unlocking with power button awaken my screen with adjusted brightness..
Hope this will help...
I think you've got to differentiate between "software-layers" and "hardware-layers" in the first place. If you put a "display foil" on top of the screen, that will certainly not reduce battery consumption (though it "dims" your display). But if it's a software layer reducing brightness, that's something completely different: How should that be achieved other ...
Even if that is true, that would not apply to all screens such as an (AM)OLED screen that doesn't use a backlight.
From Wikipedia article on amoled:
The amount of power the display consumes varies significantly depending on the colour and brightness shown. As an example, one commercial QVGA OLED display consumes 0.3 watts while showing white text on a ...
Super late, I know, but this may help out anyone who comes across this later. What I did for my phone, the Alcatel Fierce, I got ES File Explorer and browsed until I found the LED controls. For my phone its in /sys/class/LEDs/LCD backlight/ then there is a file named brightness which controls the actual brightness of the phone. I viewed it as text and saw on ...
Automation is the preferred option, or rather only option in this case, since Android OS does not offer any settings for requirements quoted.
Many apps are available. I prefer using MacroDroid , since it is free (upto 5 macros) and easy to learn.
MacroDroid creates and runs Macros to automate
A macro consists of the following (elaborating on app help):
Maybe everytime you unlock the screen, the phone sets the brightness to the current brightness value specified (set) by the slider.
This is something that has to be changed in the framework-res.apk .
If you know how to edit it using APKtool, just proceed.
Otherwise, the most easiest way is using a Tasker app.
Just add a task to set (echo) the brightness ...
Is this what you're looking for?
(Click image to enlarge)
I'm not good in drawing so excuse my skills for not providing a breathtaking scene at first glance. However, with multiple attempts, you may come close to exactly what you need.
The low-light section in the screenshot is caused by an overlay shown by Tasker. Tasker can do it using Scenes.
Go to ...
Note: the solution below requires your Android to be rooted.
I believe that automation without root wouldn't straightly deal with the issue, since it is not changing or overriding anything, but doing its own stuff over the existing changes. I was about to post on similar lines until I realized that the key to the solution is a file named max_brightness, a ...
Using ADB Tool, you can adjust the device brightness, by following command
adb shell settings put system screen_brightness 200
In order to get more info about what ADB is and other details refer the adb tag-wiki.
To Run below command, you need following:
Computer/Laptop with with ADB Installed.
Computer/Laptop Should recognize device when connected ...
Android has removed "Auto-brightness" in place of "Adaptive brightness" on Android 5.0 Lollipop.
From Android Police,
If you're looking for the auto-brightness switch on the Android L preview build, you won't find it. That's because it's been replaced with the adaptive brightness toggle. [...]
In short, adaptive brightness is like quasi-...
I achieved this using Tasker. I created a Profile that, when plugged in, activates a task that sets the display timeout to a huge value. I accompanied it with an exit task that sets a normal-length display timeout.
So I did a bit of digging and found two related threads describing your problem:
User Friendly Solution
As you've described you had transferred over your settings from a different device and the 'Night Light' settings were hidden by the Samsung software.
The most user friendly way is from Reddit:
PSA: Night Light and Blue Light Filter Overlap
where the ...
I have been using Lux Lite and it works well for me.
Lux isn't your ordinary brightness app. It intelligently adjusts the brightness of your display based on the environment you're in. If you step into a dimly lit room, Lux will automatically lower the brightness of your display to make it not only comfortable to read, but to also preserve battery power.
So I went digging in the Cyanogen source code. It appears that settings work as follows:
The brightness is determined from ambient light sensor based on spline (can be changed in "Adjust").
Brightness adjustment - Makes overall auto-brightness result darker or lighter by affecting gamma value. Centering the slider means "no change".
Adjust to sunrise and ...
Here's a much easier solution, especially if the screen is so dim that you can't read any of the display options. Simply place TWO fingers on the screen and slide them up for brighter, down for dimmer. Simple!
Try to increase brightness in the same dark condition. Lock the phone using power button. Swipe up. Swipe down twice. Then try to move your finger left to right on the top 30% of your screen. Eventually you will be able to get your screen back. Do it patiently. It works. And be careful till this bug is fixed.
If you're using Android 5.x/6.x, then under Display setting of Settings app you should be able to find an option named Adaptive Brightness. That should precisely do the job. In preceding Android versions, there is Auto Brightness but I do not know how it functions. If what benjaminS stated is true, then it should work well.
In any case, if the auto/adaptive ...
I can't comment on the ROM behaviour on your device, but here is an alternative that is found to fix the problem - see OP's comment
Velis Auto Brightness, app description of relevance says:
Velis auto brightness aims to provide the best possible brightness experience by using your devices sensors to determine the environment you're in. You have complete ...
Turns out you have to accept the Lenovo customer-whatever and register when first installing the tab to get full functionality. The device is usable without registration, but there seem to be a few functions missing.
Change/set the following parameters in the build.prop to set the brightness.
The above is an example. The first set the minimum.
The range is from 1 to 255. 1 being the minimum level that can be set while 255 is the maximum.
Disclaimer: Not tested on Lollipop as my device is NOT on Lollipop, my device doesn't brighten up screen on full charge. Would request OP or Samsung S4 galaxy users to confirm. Theoretically should work
Firelord in his solution has highlighted a point that my earlier solution entails that the screen is lit for milli seconds that could possibly cause a ...
Yes it is possible to reduce the brightness level below the default screen brightness slider level. You can use, Night Mode app from Play Store.
As mentioned in the app description,
Night Mode's main goal is to reduce the brightness of your screen
lower than you can achieve with the default settings.
And this app doesn't require you a root permission. ...
You can disable MX Player's brightness controls. To do this, goto Settings>Player>Screen and uncheck the brightness option.
And, an alternate option is to use an xposed module(you need a rooted device) named Minimum Brightness.
Found the answer myself and it's a 'yes'. I'll share it here in case it's useful to someone else.
This XDA thread was the basis of the fix http://forum.xda-developers.com/galaxy-s2/themes-apps/mod-lower-auto-brightness-levels-to-t1235212 main points extracted here:
Here is a guide on how to perform this mod on any framework-res.apk using apk manager (...
It is not possible to calibrate the mechanism normally. The screen brightness values are fixed.
You could use an app like Lux Auto Brightness to manage your screen brightness instead of using the default auto brightness setting. This isn't a perfect solution but it is probably the easiest to implement. Alternatively, you could root your phone and install ...
This is an old question, but aside from Dan Hulme's comments it doesn't really have a clear and correct answer.
To the questions in the OP: Yes to both, if you're using a backlit display.
There are two very different types of screens in phones: backlit and non-backlit.
LCD displays are backlit. The backlight brightness is the main factor in screen power ...
I have found under setting (in Android 4.3 anyway) that I can go to Device: Accessibility:Negative Colors. This will produce the "inverse video" effect so normally white backgrounds are black. In conjunction with normal (or app enhanced) screen dimming this reduces liht significantly over the normal black on white output.
I will update this answer if I ...
The L90 lacks an ambient light sensor, so there is no true auto brightness method.
XDA user gdjindal has a unique tutorial for adding a pseudo-automatic function on the Optimus L9 (it'll most likely work on your phone as well): link