New Dell XPS 14 (L421x) brightness does not work with Intel 9.18.10.3071 drivers.

[FMast3]

We just purchased about half a dozen new Dell XPS 14 (L421x) laptops from Dell. I wiped out all the hard drives and re-installed fresh copies of Windows 8 x64 on all the machines.

The brightness controls do not work on ANY of the machines!

Neither the F4/F5 buttons, nor does the slider control in Power Options will change the brightness of the screen.

I installed the latest drivers from Intel version 9.18.10.3071.

None of our systems have the Nvidia cards, they only have HD 4000 on board graphics.

Intel, please help!! Not being able to lower brightness kills the battery!

[Marcos_U_Intel]

Try the Previously released graphics driver at the link below:

https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=22375&lang=eng&OSVersion=Windows%207%20(64-bit)*&DownloadType=Drivers https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=22375&lang=eng&OSVersion=Windows%207%20(64-bit)*&DownloadType=Drivers

[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