Display brightness at max after 1803 update

Anonymous
2018-05-03T16:42:57+00:00

Hello!

I upgraded my laptop over the weekend to Windows 10 1803. I noticed my display was set to max brightness. I am unable to use the F keys to lower the brightness. I am also unable to change the brightness in the display settings. My drivers are all updated. Any suggestions on how to fix this?

I have a Toshiba Satellite with the Intel (R) HD Graphics.

Windows for home | Windows 10 | Devices and drivers

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  1. Anonymous
    2018-05-28T01:03:48+00:00

    La ubicación escrita de  FeatureTestControl era diferente en mi sistema. La ubicación fue:

    HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet001 \ Control \ Class \ {4d36e968-e325-11ce-bfc1-08002be10318} \ 0001

    Tenga en cuenta que después de hacer esta edición, seleccionar el nivel más bajo de brillo apagará su pantalla. Esto también significa que si está utilizando la batería (portátil) y selecciona el modo de alimentación "Mejor duración de la batería" o Windows cambia automáticamente a "Mejor duración de la batería" al desconectar el cargador, ¡la pantalla se APAGARÁ! Esto no es una preocupación importante ya que puede aumentar el brillo al siguiente nivel más bajo mediante el atajo de control de teclado FN + F3 (combinación de teclas podría ser diferente en otras marcas de portátiles) y la pantalla volverá a encenderse.

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  2. Anonymous
    2018-05-28T00:57:54+00:00

    feature test control not found

    1. Navigate to the following key:
      • HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/Class/ 4d36e968-e325-11ce-bfc1-08002be10318 /0000
    2. Double-click the item of FeatureTestControl, set the hexadecimal value to "fb20", and click OK.
    3. Reboot your computer to reflect the changes.

    :(

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  3. Anonymous
    2018-05-27T22:51:00+00:00

    This solution from Ferdz Amp solved my problem.

    For those still encountering this issue, I recommend that you follow these steps and see if the issue persists:

    1. In Windows start search box, type in regedit and hit Enter.
    2. Navigate to the following key:
      • HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/Class/ 4d36e968-e325-11ce-bfc1-08002be10318 /0000
    3. Double-click the item of FeatureTestControl, set the hexadecimal value to "fb20", and click OK.
    4. Reboot your computer to reflect the changes.

    Registry Disclaimer: The steps mentioned here includes system registry modification. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow the steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base: Article ID 322756.

    Let me know how it goes.

    The written location for FeatureTestControl was different on my system. The location was:

    • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class{4d36e968-e325-11ce-bfc1-08002be10318}\0001

    Please be aware that after doing this edit, selecting the lowest level of brightness will turn off your screen. This also means that if you are running on battery (laptop) and you select the power mode "Best battery life" or Windows automatically switches to "Best battery life" upon unplugging the charger, your screen will be turned OFF! This is not a major concern since you can just turn up the brightness to the next lowest level via the FN+F3 (key combo might differ on other laptop brands) keyboard control shortcut and the screen will be turned back ON.

    Taken from here:

    https://answers.microsoft.com/en-us/windows/forum/windows_10-update/screen-brightness-stuck-at-maximum-after-updating/2c364180-cab4-4704-b07f-701a1bac89a5?tm=1525126129348

    Worked so perfectly for me!

    God bless you!

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  4. Anonymous
    2018-05-27T20:05:03+00:00

    Esta solución de  Ferdz Amp resolvió mi problema.

    Para aquellos que aún tienen este problema, les recomiendo que sigan estos pasos y vean si el problema persiste:

    1. En el cuadro de búsqueda de inicio de Windows, escriba  regedit y  presione Enter.
    2. Navegue a la siguiente clave:
      • HKEY_LOCAL_MACHINE / SYSTEM / ControlSet001 / Control / Class / 4d36e968-e325-11ce-bfc1-08002be10318 / 0000
    3. Haga doble clic en el elemento de  FeatureTestControl, establezca el valor hexadecimal en " fb20" y haga clic en  Aceptar.
    4. Reinicia tu computadora para reflejar los cambios.

    Descargo de responsabilidad del registro: los pasos mencionados aquí incluyen la modificación del registro del sistema. Sin embargo, pueden producirse problemas graves si modifica el registro de forma incorrecta. Por lo tanto, asegúrese de seguir los pasos cuidadosamente. Para mayor protección, realice una copia de seguridad del registro antes de modificarlo. Luego, puede restaurar el registro si ocurre un problema. Para obtener más información acerca de cómo hacer una copia de seguridad y restaurar el registro, haga clic en el siguiente número de artículo para ver el artículo en Microsoft Knowledge Base: ID del artículo  322756.

    Déjame saber como va.

    La ubicación escrita de  FeatureTestControl era diferente en mi sistema. La ubicación fue:

    • HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet001 \ Control \ Class \ {4d36e968-e325-11ce-bfc1-08002be10318} \ 0001

    Please be aware that after doing this edit, selecting the lowest level of brightness will turn off your screen. This also means that if you are running on battery (laptop) and you select the power mode "Best battery life" or Windows automatically switches to "Best battery life" upon unplugging the charger, your screen will be turned OFF! This is not a major concern since you can just turn up the brightness to the next lowest level via the FN+F3 (key combo might differ on other laptop brands) keyboard control shortcut and the screen will be turned back ON.

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  5. Anonymous
    2018-05-27T16:18:23+00:00

    Hey Andre,

    I have the same problem. I hope you can help me. I tried what you mentioned, but in vain. I am attaching my system summary.

    OS Manufacturer Microsoft Corporation

    System Name LENOVO-PC

    System Manufacturer LENOVO

    System Model 20042

    System Type x64-based PC

    System SKU Calpella_CRB

    Processor Intel(R) Core(TM) i3 CPU       M 380  @ 2.53GHz, 2533 Mhz, 2 Core(s), 4 Logical Processor(s)

    Requesting your help on this,

    Augus J. Edakkara

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