Brightness control doesn't work in windows 8 64bit...

Hi guys!!i have this problem since i installed windows 8 64bit on my laptop.i used every version of ati drivers for my 7970m but brightness control is broken in w8.i can't change it using Fn keys or the built in windows 8 brightness settings.anyone has the same problem?in windows 7 brightness controls worked like charm.pls help me!thx in advance.

 

one simple answer to that, there is no fix for this issue yet, but i actually chased down the root of that problem, the problem is caused by the AMD Drivers if you use the Win8 stock AMD drivers brightness works without any issues. The only solution right now is to use stock drivers or install Win7 or you continue to use Windows 8 and only change the brightness before the OS boots up.

 

so they have this issue lot of ppl?some others doesnt have this issue at all even if they use windows 8.how is that possible?as u said i change the brightness before os boots up.amd is aware of this problem?

 

Have you updated the Windows 8 hotkey utility Software Upgrade

 

i installed it today but it doesnt make any difference.....

 

i hope AMD is aware of that i actually send an bug report to them but never got an email back that they received it unfortunately but i actually think they will just say something like "P150HM and 7970M isn't official supported so <insert random curse here>" like they always do just look at the ENDURO issue the 150/170EM series had.

Hotkey Drivers are not helping i already tried that and only stock win8 7970m drivers are working but you loose the improvements which e.g. 12.11b.. does, actually the problem exists since 12.10

 

Try uninstalling the display driver. It's been a fix for some on Asus UX series laptops where they couldn't adjust the brightness either; can't guarantee it will work here, but you never know.

Go into Device Manager, right click on your driver under Monitors, and select "uninstall". Then either reboot or Scan for Hardware Changes and see if that helps.

 

I've been searching for a fix for this problem for ages and I figured out a fix that works for me and maybe it'll work for you.

1. Open Device Manager (Right click in the bottom right corner of the screen, click Device Manager)
2. Expand the Monitors
3. Right click on "Generic PnP Monitor" and choose Disable
4. Reboot

I have an early 2011 MBP with a Radeon 6750M and Windows 8 Pro installed with Bootcamp 5 and Catalyst drivers for reference.

 

just tried it.still doesnt work.now brightness settings dessapeared.