Upgraded to Windows 10, can no longer change Macbook display brightness?

I ended up getting it to work. You have to uninstall the display driver (7400m in my case. Maybe different for you) in device manager. Choose to delete the driver. Then do a scan for hardware change and it should install the correct driver. Then download and run the:

"Show or hide updates" troubleshooter package now. from Microsoft and select the video card driver you don't want windows update to install.

Page reference:

https://support.microsoft.com/en-us/kb/3073930

This will prevent windows update from auto installing this particular driver but will continue to allow other updates to be installed.

Dave

Do you have any unknown devices in Device Manager?

Under W7, they are Generic PnP Monitors.

I have the same issue. Early 2011 MBP. reinstalled bootcamp drivers but still no brightness control.. I only have one monitor listed as Generic PNP Monitor.Using the F1 or F2 keys shows the brightness slider but as the slider goes up and down,no change in brightness. Going into display properties and sliding the slider manual has no effect either.

Dave

Hello, just reinstall Bootcamp and they will work again.

But for that, you have to find the installer first. I found using google, but seems bootcamp website does not leave it easy for post-2014 MacBook pro users to download.

You should find it on this address:

https://support.apple.com/kb/DL1720?locale=en_US

On this same kb article you'll find directions to download the proper version if your MacBook is an older one.

hope this helps

EDIT: after installing this version, the apple updater might offer you to install bootcamp6 with "better" windows 10 support (I didn't notice a single change), you can accept and install the ~1.2GB update. The installation on the link above sums up to 800MB.

As stated by myself and the original poster of this thread, the Boot Camp Support Software 5.1.5621 drivers were installed with no change.. Brightness changes do not work.

Boot Camp Support Software 5.1.5640 is not for Early 2011 MacBook Pro's so there is no update using the apple updater.

Doing some more searching and this appears to be an issue with the AMD Radeon driver. In my case the AMD Radeon HD7400m Driver Apparently a windows 10 driver is in the works.

I am facing same issue the brightness bar goes up and down but there is no visible change in the brightness. I have tried disbling the adaptive brightness and automatic brightness settings but still it doesn't seem to work.

Please can someone help.

I did a fresh install on my macbook pro retina 13 inch using the latest bootcamp drivers. THanks

This seems to be a working solution:

-Search for and open "device manager" in cortana.

-uninstall the drivers for both display adapters and monitors.

-restart your computer.

Upon restart, windows automatically reinstalls the drivers and now your brightness controll should be working.

My original problem went beyond the keyboard brightness control: in my case, Windows actually didn't have a brightness slider and the button that changes the brightness by 25% (in the battery icon in the bottom right of the screen) was greyed out, so I couldn't even click it.

This seems to be a fairly common problem, as I quickly found this workaround solution via google.

Hope it helps!!

Found that the Generic PnP Monitor in Device Manager was disabled. Enable it and was able to adjust screen brightness again.

This worked for me as well. I have no idea why it was disable, but now it works.

Er... what? I disabled the Generic PnP Monitor, restarted, and I was able to adjust brightness again.

Found this solution as the top comment here: https://www.reddit.com/r/Windows10/comments/32yjrb/windows_10_issues_with_bootca mp_amd_graphics/