Advice Request Display Brightness key stopped working (Solved)

[Skinoku]

Hi everyone,
About a week ago, my laptop's brightness key stopped working.
It's not a hardware problem because if I try changing it from control panel I fail. Brightness icon disappeared into windows 10 home x64 1151 as well as control center.
I tried reinstalling both Intel and Nvidia drivers.
the machine is an Acer E5-571G-50NS upgraded to Windows 10 about a year ago.
Thanks in advance,
cheers!

 

[Deleted Member 333v73x]

When you say you 'fail' changing brightness in the control panel do you get an error message, what do you mean?

Is your PC fully up to date with Windows Update?

 

[Skinoku]

Sorry @Tornado I get no error messages, I simply get nothing changing as I move the slider. The pc is fully up-to-date via windows update.

 

[Ink]

I have had a similar experience when I initially installed Windows 8.0, but after installing both Intel (on-board) and Nvidia (GPU), following a reboot, everything started working.

Brightness may stay at brightest settings when there's no Graphics driver installed.

 

[Skinoku]

I tried that, but it doesn't work.
I did a clean install of both Intel and Nvidia drivers, one time from the CHIP MANUFACTURER site (Intel and Nvidia as I usually do), another from Acer website, both ended up into a perfect running machine without backlight control

 

[Venustus]

I tried that, but it doesn't work.
I did a clean install of both Intel and Nvidia drivers, one time from the CHIP MANUFACTURER site (Intel and Nvidia as I usually do), another from Acer website, both ended up into a perfect running machine without backlight control

Does this happen on both on battery/plugged in?

PS:Have you tried this:
Cant change brightness in Windows 10

1) Search for Device Manager in Start Menu
2) Expand the Monitors section
3) Right click on Generic PnP Monitor and
4) Click on Enable and you are good

 

[Skinoku]

thank you @venustus yes the problem appears both in battery and AC mode.
I tried checking in device manager but it was already correctly enabled. I also tried uninstalling it and reinstalling it without luck...
I checked the monitor PnP driver that looks like this:

FORNITORE: TeamViewer GmbH
DATA: 23/11/2010
VERSIONE: 1.1.0.0
FIRMA DIGITALE: TeamViewer GmbH

 

[jamescv7]

Try to revert using system restore the day where issue isn't present.

My laptop happened before on Windows 10 but upon reboot also and enable the hardware from Device Manager should solve the case.

 

[Skinoku]

Finally, after days of headache I finally got it working.
I'd like to share what I did in case of someone with the same problem.
In Device Manager I FULLY UNINSTALLED both the DEVICE and the DRIVER.
After refreshig the list the display adapter installed the windows generic driver and worked like a charm.
From TeamViewer now is showing Microsoft Generic Plug'nplay device.
Thanks anyone for helping me and I hope this tread will solve someone's headache.
Cheers!