Screen brightness stuck at max after updating to Windows 10 version 1803 (build 17134 / April 2018 Update)

Anonymous

I just updated the Windows 10 Home installation on my laptop to build 17134 and now I can't adjust the screen brightness. It's stuck at the highest brightness setting and while the brightness slider moves up and down it doesn't change anything. I tried deleting the display and graphic drivers and reinstall them but it didn't solve my problem. My laptop is an old lady so it no longer receives driver updates. Any suggestions?

Specs: https://support.hp.com/ee-en/document/c02286076

HP Envy 14-1090eo

2.4 GHz Intel Core i5-450M

ATI Mobility Radeon HD 5650 1GB DDR3 (Switchable)

8GB (2x4GB) Samsung PC3-12800 DDR3

Samsung SSD 850 EVO 1TB

Display drivers:

- 1. Primary: Intel® HD Graphics (Core i5)

Report Date: 4/30/2018

Report Time[hr:mm:ss]: 23:53:55

Driver Version: 8.15.10.2900

Operating System: (6.2.9200)

Default Language: English (United States)

DirectX* Version: 10.1

Physical Memory: 7989 MB

Minimum Graphics Memory: 32 MB

Maximum Graphics Memory: 973 MB

Graphics Memory in Use: 115 MB

Processor: Intel64 Family 6 Model 37 Stepping 5

Processor Speed: 2394 MHz

Vendor ID: 8086

Device ID: 0046

Device Revision: 02

**- 2. Secondary:**ATI Mobility Radeon HD 5650

Radeon Settings Version - 2016.0226.1531.27895

Driver Packaging Version - 15.301.1901-160226a-299900E

Provider - Advanced Micro Devices, Inc.

2D Driver Version - 8.1.1.1533

Direct3D® Version - 9.14.10.1171

OpenGL® Version - 6.14.10.13417

OpenCL™ Version - 2.0.4.0

AMD Mantle Version - 9.1.10.99

AMD Mantle API Version - Not Available

AMD Audio Driver Version - 10.0.0.3

Update May 25, 2018:

This solution from Ferdz Amp with a minor tweak solved my problem.

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

In Windows start search box, type in regedit and hit Enter.

Navigate to the following key:

HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/Class/ 4d36e968-e325-11ce-bfc1-08002be10318 /0000

Double-click the item of FeatureTestControl, set the hexadecimal value to "fb20", and click OK.

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 is:

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.

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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Answer accepted by question author

Anonymous

Hi

I just updated the Windows 10 Home installation on my laptop to build 17134 and now I can't adjust the screen brightness. It's stuck at the highest brightness setting and while the brightness slider moves up and down it doesn't change anything. I tried deleting the display and graphic drivers and reinstall them but it didn't solve my problem. My laptop is an old lady so it no longer receives driver updates. Any suggestions?

Specs: https://support.hp.com/ee-en/document/c02286076

HP Envy 14-1090eo

2.4 GHz Intel Core i5-450M

ATI Mobility Radeon HD 5650 1GB DDR3 (Switchable)

8GB (2x4GB) Samsung PC3-12800 DDR3

Samsung SSD 850 EVO 1TB

Display drivers:

- 1. Primary: Intel® HD Graphics (Core i5)

Report Date: 4/30/2018

Report Time[hr:mm:ss]: 23:53:55

Driver Version: 8.15.10.2900

Operating System: (6.2.9200)

Default Language: English (United States)

DirectX* Version: 10.1

Physical Memory: 7989 MB

Minimum Graphics Memory: 32 MB

Maximum Graphics Memory: 973 MB

Graphics Memory in Use: 115 MB

Processor: Intel64 Family 6 Model 37 Stepping 5

Processor Speed: 2394 MHz

Vendor ID: 8086

Device ID: 0046

Device Revision: 02

**- 2. Secondary:**ATI Mobility Radeon HD 5650

Radeon Settings Version - 2016.0226.1531.27895

Driver Packaging Version - 15.301.1901-160226a-299900E

Provider - Advanced Micro Devices, Inc.

2D Driver Version - 8.1.1.1533

Direct3D® Version - 9.14.10.1171

OpenGL® Version - 6.14.10.13417

OpenCL™ Version - 2.0.4.0

AMD Mantle Version - 9.1.10.99

AMD Mantle API Version - Not Available

AMD Audio Driver Version - 10.0.0.3

Moved from ( Windows / Windows 10 / Windows update, recovery, & backup )

did new cumulative update fixed brightness issue?

No KB4100403 (OS Build 17134.81) didn't solve it. But this solution from Ferdz Amp with a minor tweak did.

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

In Windows start search box, type in regedit and hit Enter.

Navigate to the following key:

HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/Class/ 4d36e968-e325-11ce-bfc1-08002be10318 /0000

Double-click the item of FeatureTestControl, set the hexadecimal value to "fb20", and click OK.

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 and is located in:

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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78 additional answers

Anonymous

2018-05-15T19:16:05+00:00

This problem is actually on Acer8935G with Mobile intel 4 series integrated graphic card
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Anonymous

2018-05-08T06:01:10+00:00

I'm still having problems and from the looks of it so does a lot of other peoples (@ HP, Lenovo, Dell, Intel, Gigabyte, Samsung forums).

adding Acer 4736z to the list. It has Mobile intel 4 series integrated graphic card, and facing same problem with Shodan2k after updating to 1803 from 1709 yesterday, May 7, 2018.

Any update for a fix? The microsoft windows basic graphic display adapter doesn't have 1366 x 768 resolution nor does the brightness slider work.
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Anonymous

2018-05-04T22:45:56+00:00

I'm still having problems and from the looks of it so does a lot of other peoples (@ HP, Lenovo, Dell, Intel, Gigabyte, Samsung forums).
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Anonymous

2018-05-02T20:57:26+00:00
We appreciate the update, Shodan. If that is the case, then let us check the integrity of your Windows installation by using the System File Checker tool (SFC.exe) and the Deployment Image Servicing and Management (DISM.exe). For the steps on how to use these tools, kindly refer to the following link: System file check (SFC) Scan and Repair System Files & DISM to fix things SFC cannot.

If you have not yet done so, we highly suggest that you post this concern and your experience on the Feedback Hub to let our engineers know about this issue. Here's how:

On a Windows 10 device, search for Feedback Hub in Cortana, then launch the app.

Navigate to Feedback in the left menu, and then press + Add new feedback.

Select the Problem, and share any details you think are relevant, and choose an appropriate category and subcategory.

Important: If possible, reproduce the problem after clicking Begin monitoring (or Start capture) near the end of the form; Stop monitoring when you’re done.

Once you’ve completed the form and monitoring, click Submit.

Click Continue using Feedback Hub.

Click My feedback at the top, then find the item you submitted (it may take a while to appear).

We highly encourage that you share the link to your feedback in this thread.

If you need further assistance, please do not hesitate to post a reply.
I did the sfc scan + Dism and it didn't find any problems or fix the problem.

I have already provided a feedback in the HUB program with logs, problem description, system information file etc.
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