Can't adjust my laptop's screen brightness...

[krit2]

After i fresh installed windows 10, i cant adjust my screen's brightness. I could back when i run my laptop on windows 8 (not 8.1). I have tried adjust via the function key on my latop and down on the tool bar where there is a power option and screen brightness box for me to click.

My laptop's model: Fujitsu LH530
i5-450m
ATi Mobility Radeon HD 5000 series GPU

These are the things that i have tried.
- I have tried installimg the latest version of the gpu driver. Which is Catalyst 15.7.1 latest driver
- I have tried install hotkey utility driver from Fujitsu's website

- I have tried inta

 

[BFG-9000]

This is supposed to be a known issue with Catalyst 15.7.1, which is also the latest driver for Windows 10

Problem: LCD brightness control not working
Solution: Registry Editor (regedit.exe)
At both:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001
Find both:
MD_EnableBrightnesslf2
KMD_EnableBrightnessInterface2
Set both to 0.

Reboot
You may need to, in Device Manager, disable your video adapter and re-enable.
Test your LCD brightness settings Fn + F8, F9

 

[grimfox]

Check with fuijitsu, there is probably a driver you'll need to install to handle hardware controls. Fujitsu is probably using a proprietary control system for controlling the brightness. I had to do something similar to get my volume and keyboard backlighting working on my laptop.

 

[krit2]

This is supposed to be a known issue with Catalyst 15.7.1, which is also the latest driver for Windows 10

Problem: LCD brightness control not working
Solution: Registry Editor (regedit.exe)
At both:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001
Find both:
MD_EnableBrightnesslf2
KMD_EnableBrightnessInterface2
Set both to 0.

Reboot
You may need to, in Device Manager, disable your video adapter and re-enable.
Test your LCD brightness settings Fn + F8, F9

This worked!! Thank you so much.

 

[kogbaugo]

This is supposed to be a known issue with Catalyst 15.7.1, which is also the latest driver for Windows 10

Problem: LCD brightness control not working
Solution: Registry Editor (regedit.exe)
At both:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001
Find both:
MD_EnableBrightnesslf2
KMD_EnableBrightnessInterface2
Set both to 0.

Reboot
You may need to, in Device Manager, disable your video adapter and re-enable.
Test your LCD brightness settings Fn + F8, F9

Is there anyway you could simplify this for the sake of those who aren't very tech savvy? I think I understand that I need to adjust a file somewhere, but I am not sure what kind of file. Could you elaborate please?

 

[BFG-9000]

Those instructions are about as simplified as they can possibly be. I would suggest googling for instructions or videos on how to use "registry editor" and then you can probably figure out the rest. There are 4 places where changes need to be made.

It's unlikely there will ever be a newer driver to fix this as 15.7.1 is already two years old.