Question from user
Hello. My brightness on my laptop began to spontaneously change: with a dark image, the brightness drops, and with a light one, it is restored to its normal level.
How can I get rid of this problem, otherwise my eyes began to get tired because of it? OS: Windows 8, graph. accelerator (video card) Intel HD 4000 (built-in).
Good day!
This problem began to appear more and more often after the release of Windows 8 (this OS introduced the ability to adaptively adjust the brightness, depending on the picture on your screen). Also, some laptops are equipped with special software and sensors that determine the level of illumination in the room, and according to it, adjust the brightness of the screen.
There is nothing wrong with this, but in certain cases such a change does not allow it to work normally and interferes with the user. In the article I will tell you in detail how you can turn off this spontaneous change in brightness ...
Eliminate automatic monitor brightness changes
1) Disable adaptive brightness control
This is the first thing to do. This option is available in Windows 8, 8.1, 10. Those who have Windows 7 can omit this part of the article.
You need to open the power settings section:
- or via the following address: Control Panel\Hardware and Sound\Power Options
- or by pressing the Win + R keys and entering the powercfg.cpl command (see screenshot below).
In power settings: follow the link "Setting the power plan" in the selected mode (on the screen below it is balanced mode. The selected mode is marked in bold black).
And now find among the settings tab "Screen" and open it. Here in the tab there are 3 key settings:
- screen brightness on battery and mains: set the values that suit you;
- screen brightness level in dimmed mode: set exactly the same values that you have set in the tab "Screen Brightness";
- turn off adaptive brightness from the mains and battery (see screenshot below).
Now save your settings and try looking at bright and dark pictures (for example) to see if the brightness changes. As a rule, such settings completely eliminate this problem ...
Update 06/10/2018
If you are using Windows 10, pay attention to its control panel (to go to it - press Win + i). In chapter "System/Display" there is a special a setting that allows the laptop to change its brightness as the ambient light changes. Turn it off too!
2) Setting the power supply of the video card
The laptop itself can reduce the brightness under certain operating modes. For example, Intel HD graphics cards support Display Power Saving Technology, extended gaming time on battery power. Similar technologies exist in both AMD and nVidia.
First you need to go to the video card driver settings (you can through - see the screen below), or you can through the tray icon, next to the clock.
Intel graphics settings (tray)
Important!
If you do not have a tray icon, and there is also no link to the graphics settings in the control panel, then most likely you do not have drivers installed (it is likely that you have a "universal" driver that was installed during Windows installation). In this case, I recommend programs for updating drivers:
They need to set the following:
- set the power saving option to maximum performance mode;
- turn off extended game play time on battery power;
- disable display power saving technology (screen below - see arrows).
Note!
For example, in AMD video cards, you need to open the "Power" section, then enable maximum performance, and disable Vari-Bright technology (this is AMD's technology that allows you to adjust brightness).
Vari-Bright disabled! (AMD Graphics settings) / Clickable
3) Sensor Surveillance Service
There is one service in Windows that monitors the sensors and adjusts the display lighting, depending on the illumination of the room in which your device works.
I can say that sometimes the service does not work properly and can affect the brightness adjustment, even if you do not have any sensors!
How to disable sensor monitoring services
Open a window with services: the easiest way is to press the keys Win+R, enter services.msc, press Enter. The method works in all versions of Windows.
Next in the list you need to find the service "Sensor Monitoring Service" , open it. In the graph "launch type" put [disabled], and stop the service itself so that the status is listed as "Stopped" (see screenshot below).
Then save the settings and restart the laptop.
4) Laptop Control Center
Certain laptop models have a control center among the software installed with the drivers. For example, in the VAIO laptop line from SONY, there are VAIO control center .
In this control center, for example, you first need to open the tab "Power supply" and set high performance, as well as disable the function that extends battery life (see screenshot below).
High performance // Power // VAIO control center
Image Quality // VAIO Control Center
Actually, it is hardly possible to give a description for each of these centers. The VAIO Center is shown above as an example of such software.
Something similar is also in Lenovo laptops: a variety of night modes, dynamic changes in brightness, contrast, and other things can significantly change the quality of the picture on the screen. It is recommended to turn them all off (at least at the time of setup and adjustment).
5) Problems with iron
A change in screen brightness can be associated not only with software settings, but also with faulty hardware. In what cases can you determine that the laptop hardware is to blame:
- if not only the brightness changed on the screen, but stripes, ripples, dots began to run (as in the example below);
- if when you add / decrease the brightness on the monitor, absolutely nothing happens;
- if the brightness changes even without changing the picture on the screen and without changing the lighting mode in the room;
- if the brightness in different parts of the screen is different.
To help!
If you have stripes and ripples on your monitor, I recommend that you read another article of mine:
Stripes and ripples on the screen / As an example
Successful work!