Trouble adjusting brightness in Windows 8.1

I know there are other threads on this, but none of the solutions seems to be working for me.
I manage multiple MBP-13in Retinas (Late 2013) and I'm having trouble adjusting the brightness of the laptop screen on all of them.
I have tried everything mentioned in other posts
Adaptive Brightnss
Disabling the Generic PnP driver
Reinstalling everything
Changing the resolution
The best work around I can figure out is hitting Comman + P (Windows Key + P) switching the display mode to extend (or anything else) and then switching it back to PC Display only. After doing that it works everytime.
It also seems to finally work if I leave the computer on for about 15 mins or so, or if I shut the lid and then open it back up again.
Would love a new release of BootCamp to fix this, any work arounds that people have discovered specifically for the 13in MBPr Late 2013 would be greatly appreciated.
Thanks!

Clean install 8.1 via boot camp
We make a few consistent changes but I can't imagine these are related but here's a full list
Disable hibernation, page file, adaptive brightness, system restore
Power settings never sleep while plugged
On display settings, try for best performance it will likely uncheck everything (we keep 5 but can't recall)

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This question was solved.
View Solution.

Dear Customer,
Welcome to HP Support Forum and we are glad to assist you.
It looks like you are trying "Adjust Screen Brightness in Windows 8.1" for your Notebook.
We will surely assist you with this.
Please perform this step as shown below to resolve the issue:
1. Go to Search (point at upper right corner) and type Device Manager. Go there.
2. Expand Display Adapters
3. Right-click Intel(R) HD Graphics and Left-click Disable
4. Restart your computer
Note: Your screen resolution might be distorted now, you can just ignore
5. Go back to Device Manager, Display Adapters
6. Right-click Intel(R) HD Graphics and Left-click Enable
7. Restart again
Note: If at any point your screen goes blank and won't come back, just HOLD DOWN your power button until
the computer shuts down. Then press power again to start up
Hope this helps, for any further queries reply to the post and feel free to join us again
"I work for Hewlett-Packard"
* * * * * Click the "Purple Thumbs Up Icon in the lower right corner of a post" to say thanks * * * * *
* * * * * Please mark Accept As Solution if it solves your problem * * * * *
Regards,
K N R K

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