Brightness control issue on internal display when connected with external monitor in dual display - Intel HD 4000 Windows 10 Pro

[JLanc1]

Hi guys & gals,

This is driving me up the wall.. whenever I connect an external display to my laptop via the HDMI port to use them both in extended dual monitor mode the internal display on the laptop goes dim and the brightness control doesn't work.. the only solution I've been able to find is if I go into the device manager and change the driver for the display adapter from the Intel HD Graphics 4000 current driver, to the Microsoft Basic Display Adapter, this fixes the brightness on the lap but in order to get the picture back on the external monitor I have to go back to the Intel HD graphics 4000 driver.. this works but I unhook my laptop for school and work daily so this is a pain in the you know what.. and yes I've disabled the adaptive brightness in the power options, didn't help.. PLEASE HELP - see stats below.

Tried 3 Intel drivers, 10.18.10.4252, 10.18.10.4276, & currently 15.33.38.64.4252 with no luck..

Computer - Samsung Ativ Book - NP470R5E-501UB

Windows 10 Pro

Intel Core i5 3230M

Intel HD Graphics 4000

- Graphics tab from speccy -

Graphics

Monitor 1

Name Generic PnP Monitor on Intel HD Graphics 4000

Current Resolution 1366x768 pixels

Work Resolution 1366x728 pixels

State Enabled

Multiple displays Extended, Secondary, Enabled

Monitor Width 1366

Monitor Height 768

Monitor BPP 32 bits per pixel

Monitor Frequency 60 Hz

Device \\.\DISPLAY7\Monitor0

Monitor 2

Name HP 27xi on Intel HD Graphics 4000

Current Resolution 1920x1080 pixels

Work Resolution 1920x1040 pixels

State Enabled

Multiple displays Extended, Primary, Enabled

Monitor Width 1920

Monitor Height 1080

Monitor BPP 32 bits per pixel

Monitor Frequency 60 Hz

Device \\.\DISPLAY8\Monitor0

Intel HD Graphics 4000

Manufacturer Intel

Model HD Graphics 4000

Device ID 8086-0166

Revision A

Subvendor Samsung (144D)

Current Performance Level Level 0

Driver version 10.18.10.4276

Count of performance levels : 1

Level 1 - "Perf Level 0"

GPU Clock 349 MHz

[JReyn7]

Intel HD Graphics 4000 and Windows 10 & Windows 8.1 ( Brightness fix with latest driver)

Brightness Fix with Driver Date 8/17/2015 )

Brightness problem Solved

Intel HD Graphics 4000 with NVIDIA® GeForce® GT650M graphics.

Install:

Intel HD Graphics 4000 Driver, Driver Date: 8/17/2015

Driver Version: 10.18.10.4276

Make sure you backup your registry first before proceeding!!!!

open regedit in Run Command

Registry has wrong value:

Currently reads as :

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000] "FeatureTestControl"=

"Edit DWORD 32 bit"= f000

Registry with New Value:

You needed to change the value in registry to: ( f008 )

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000] "FeatureTestControl"=

"Edit DWORD 32 bit"= f008

Then Restart Computer

Brightness Fixed with Latest driver.

Let me know if this was helpful to you

mailto:jrreyn02@outlook.com jrreyn02@outlook.com