I have fixed this by changing my xorg.conf file from this:
Section "Device" Identifier "Default Device" Option "NoLogo" "True" EndSection
to this:
Section "Screen" Identifier "Default Screen" Option "RegistryDwords" "EnableBrightnessControl=1" EndSection
I have fixed this by changing my xorg.conf file from this:
Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
EndSection
to this:
Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
EndSection
Section "Screen" ssControl= 1"
Identifier "Default Screen"
Option "RegistryDwords" "EnableBrightne
EndSection