Reduce minimum brightness to zero on a laptop screen using the regular shortcuts.

Question

Hello,

I have a Laptop with Windows 10 and Linux. The free Linux OS can lower the screen brightness to zero, just out of the box, with the regular shortcut (like a Chromebook). This is very helpful. I would like to reach the same with the Windows OS. Is this possible?

The environmental damage – not only limited to the devices – but the electric energy waste in general is absolutely intolerable. Obviously is, that this function should be on every laptop by default.

Thanks

Answer 1

Hello Gregor,

Yes, it is possible to lower the screen brightness to zero on Windows 10. You can try using the built-in Windows settings to adjust the screen brightness to the lowest possible setting.

To adjust the screen brightness on Windows 10, you can follow these steps:

1. Click on the battery icon in the taskbar and click on the brightness icon to open the brightness slider.
2. Move the slider to the left to lower the screen brightness to the lowest possible setting.
3. If this does not lower the brightness to zero, you can try using the Windows Mobility Center to adjust the brightness. You can access the Windows Mobility Center by pressing the Windows key + X and selecting "Mobility Center" from the menu.
4. From the Mobility Center, you can adjust the brightness slider to the lowest possible setting.

Another solution is to adjust the registry settings to allow for a wider range of brightness levels. This is a more advanced method and requires some technical knowledge, so I would recommend only attempting this if you feel comfortable doing so. Here are the steps:

Press the Windows key + R to open the Run dialog box.

Type "regedit" and press Enter to open the Registry Editor.

Navigate to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class{4d36e968-e325-11ce-bfc1-08002be10318}\0001 (Note: the last four digits may vary depending on your hardware configuration).

Look for a DWORD value called "FeatureTestControl" and double-click on it to edit its value data.

Change the value from 9240 to 9250 and click OK.

Restart your computer for the changes to take effect.

I'd like also to say it is not advisable to modify the registry settings without proper knowledge or guidance as it may lead to system instability and other issues.

BR,

Vassileios

Answer 2

Thank you Vassileios,

the "FeatureTestControl" value on my machine is 8200 not 9240.

Is this the switch, that will lower the screen brightness down to zero?

Thanks again.

Answer 3

Hello,

You have to change the setting carefully, for now change the value from 8200 to 9250 and click OK, then restart the PC.

If this is not working, then change back to the original settings.

Also another solution but it is not working all the time is

1. Open PowerShell by searching for it in the Windows Start menu.
2. Type or copy and paste the command "(Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,80)" into the PowerShell console and press Enter.
3. Replace the number "80" with the desired brightness level, where 0 is the minimum brightness and 100 is the maximum brightness.
4. The display brightness should now be adjusted to the specified level.

Please note that this command may not work on all systems or may have limitations based on the hardware or drivers installed on your computer.

Also check if your drivers from your graphics cards, can you share me the model?

BR,