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Paper Tape
Posts: 9
Registered: ‎07-27-2015
Location: Brazil
Message 21 of 29 (3,986 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

1. Press the Windows key + R to open the run;

 

2. Type "regedit" to edit the windows registry;

 

3. Search for "FeatureTestControl" through the search:
or go on the path:

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

 

Double-click on the FeatureTestControl, open the box to edit. Change the Value data field for:

F00F ou FFFF

 

Close regedit and restart your computer.

 

What's DOS?
Posts: 1
Registered: ‎05-02-2016
Location: BR
Message 22 of 29 (3,518 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

Thank you!

Solved for me

 

First I used FFFF and rebooted, nothing happend.
After changing to F00F, the trick was done.

What's DOS?
Posts: 1
Registered: ‎05-30-2016
Location: US
Message 23 of 29 (3,366 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

Your procedure was VERY helpful. Thank you!

What's DOS?
Posts: 1
Registered: ‎06-10-2016
Location: US
Message 24 of 29 (3,310 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

THANK YOU. I've been working on this issue for hours. After a recent automatic driver update, my screen's brightness was stuck at 100%. I tried disabling and re-enabling the driver, uninstalling and re-installing it, reverting the update (that option was greyed out), installing F.lux (didn't work to dim my screen!), rebooting my computer, running antivirus programs. . . . Nothing worked until your suggestion to revert back to the old Windows 8 drivers! I'm using Windows 10 so I never would've thought to do that, but your suggestion worked perfectly. Thank you so much!!

What's DOS?
Posts: 2
Registered: ‎10-29-2013
Location: Texas
Message 25 of 29 (3,302 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

This works! ... Until my computer reverts to the newest driver, which it does at least once (sometimes twice) a day. Then my brightness again becomes unresponsive and I have to go through the whole process again of reverting to the Win 8 video driver. Is there any way to make it "stick"?

What's DOS?
Posts: 1
Registered: ‎08-21-2016
Location: US
Message 26 of 29 (3,062 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

If you're tryiung to prevent the new intel driver from reinstalling, I have a fix that has worked for me.

 

First off, make sure you have installed the older 8.1 driver, then let windows update install the latest driver from intel.

 

From there, right click on your start menu button and go to device manager.

 

Go to the Display Adapter section and right click on Intel(R) HD Graphics 4000, then choose "Update Driver Software..."

 

Next choose the option "Browse my computer for driver software"

 

Then choose "Let me pick from a list of device drivers on my computer"

 

From there, choose an older version of the Intel Graphics Driver from the list provided (A date should appear next to each driver). Click next and an older version of the graphics driver should then be installed, and stay installed.

 

 

I hope I could help!

What's DOS?
Posts: 1
Registered: ‎10-13-2016
Location: BR
Message 27 of 29 (2,782 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

Thanks! The compatibility mode in the setup.exe made it work for me.

I used the setup.exe on 9.17.10.3223 folder to make the installation.

My laptop is the Z400 touch.

 

Andre

Fanfold Paper
Posts: 9
Registered: ‎07-30-2015
Location: Brasil,paraiba
Message 28 of 29 (2,316 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

[ Edited ]

Alguem poderia me explicar em portuques???

 

English translation.....

 

Could someone explain me in Portuguese ???

 

Mod's Edit: Google translated for benefit of English readers.
Since this is an English forum, please post in English as it will ensure a better response.
Thanks!

What's DOS?
Posts: 1
Registered: ‎09-30-2017
Location: US
Message 29 of 29 (157 Views)

Re: Lenovo Z400 touch Brightness Problem in Windows 10

Thanks!  It worked!

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