Bootcamp 3.2 Windows 7 Brightness

In my case, it's definitely related to the Nvidia Control Panel and/or driver. Uninstalling the driver from Control Panel -> Uninstall Programs immediately gives brightness control back to the F1/F2 buttons.

However, the driver keeps reinstalling itself. Left alone for a few minutes, Windows pops up a message demanding a restart for the newly installed drivers. I'm not sure if this is a function of Boot Camp or Windows.

And upon reboot, brightness control is lost again...

System:

2011 MacBook Pro

Windows 8 Consumer Preview

Boot Camp 3.2 drivers

I have a MacBook Air running Windows 7 with bootcamp. The brightness control buttons no longer work after the 310.xx driver. Issue has been fixed after alittle bit of research. Thanks all who participated the bits and piece of this resolution. Start off by installing the latest NVIDIA drivers and latest Bootcamp. Yes you heard me correctly. No need to roll back, the latest and greatest worked for me. version 337.88
1) Go to control Panel, then device manager, then under "Monitors" I've Disabled the "Generic PNP monitor"
2) Open regedit and go to the HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Class/{4D36E968-E325-11CE-B FC1-08002BE10318}/0000
3) Add a new DWORD called "EnableBrightnessControl" and set the value to 1.
4) Reboot and the brightness keys should work again.

Have fun!!!

Polytonic wrote:

On the bright side, there's a new Bootcamp update for the 2011 MBP owners, so that maybe will fix things. If nobody else gets to it before me, I'll post back with my results later today. Supposedly it also fixes my shutdown bug in Windows.

Polytonic wrote:

Also, ckahn, with regards to the file on the Apple website, it's either going to be x86 only, or compiled into one executable that auto-detects whether you're on x86 or x64. Did you download the file directly? Or does it show up in Software Update? The software update one should pull the correct repository, as there are 32 and 64 bit versions of Apple SWUD.

The solution:

I have been struggling with this for hours, and have finally managed to find a fix that has worked (so far, so good, at least).

I rebooted the 2011 MacBook Pro 15 that I'm using and held down Command+Options+P+R to reset the PRAM (as per http://support.apple.com/kb/ht1379 ). Once I rebooted windows, it was very dim, but after everything loaded up, I could change the brightness properly with the F1 and F2 keys!

Yay!

I found the solution! FINALLY.

Specs: MBP 15" with radeon 6750 (the problem, really) (early 2011 or late 2010).

disable windows User Account Control, restart, repair the Apple Bootcamp service, restart, make sure your radeon 6750 driver is enabled, and BOOM. It works.

Here it is:

I had the exact same problem, only on a 17" MBP. In my case, Win7 event manager reported that BootCamp 3.2 Services failed to install, in particular the KeyAgent service (and without that you get no Apple keyboard and functions and apparently the BootCamp icon doesn't show up in the system tray).

Event Manager said the BootCamp installer did not have sufficient permissions, so I went to dial down the User Account Control (UAC) settings (in fact, I turned it off). What I should have seen when BootCamp 3.2 update was running was a window to ask my permission to continue (allow the software to install). Instead, there was a silent failure.

OK, so by turning off UAC that gives it permission in advance (you have to reboot after changing the UAC settings in order to ensure that it is truly OFF). After rebooting, I went to Programs and Features and found BootCamp Services as a software item. I selected "Repair" and after another reboot, I was back in business! Keyboard is now fine (including the disk eject button, which I wanted working). Then I went back to turn on UAC to its default level (one notch below highest setting). It is useful (normally) to have this on.

Ask the Windows Help system if you don't know how to find the UAC settings to give this a try. Hope it helps you.

From:

dawalters

https://discussions.apple.com/thread/2653821

Beautiful! Thankyou!

This solved my "key agent/bootcamp/volume and brightness control" problems.

griffinfromchicago wrote:

I found the solution! FINALLY.

From:

dawalters

https://discussions.apple.com/thread/2653821

My problem with brightness and Fn key support resolved with BootCamp 3.3.

http://support.apple.com/kb/DL1443?viewlocale=en_US&locale=en_US

(But it killed the BootCamp control panel function if running via VirtualBox.)

I HAVE FOUND A SOLUTION!!!!!!

The problem is due to Adaptive Brightness.

This is what you need to do if the screen does not go past a certain brightness level on Windows 7 or Windows 8.

1. Go to the Start bar on the Desktop and move your mouse all the way to the right to find the Battery icon.
   
2. Click the battery icon. A little popup box should show up. Click "More Power Options"
   
3. Select your plan and click "Change Plan Settings"
   
4. Click "Change Advanced Power Settings"
   
5. Scroll down to Display and click the little + sign next to it.
   
6. Scroll down to "Enable Adaptive Brightness" and click the little + sign next to it.
   
7. Change "On Battery" and "Plugged In" to make sure it is Off for both of them.
   

Everything should be working now! Yay me! 🙂