I have a Sony Vaio laptop, and it runs windows 7. I know I can adjust screen brightness from the control panel, but I want to force it to be even brighter. Is there a hack, or a way to do this from command prompt?
Windows – force a greater screen brightness from Windows Command Prompt
command linewindows 7
Best Answer
OK, so here's what I did:
The two commands for setting any power settings are
powercfg -SetDcValueIndex
andpowercfg -SetAcValueIndex
, depending if you want to change setting when on batteries or on AC power. This command has format (case insensitive):Then we need three GUIDs. Find them by running
powercfg -q
. The output looks like this (it will be in your system's language):Now you need to find and write down:
Display
Display Brightness
Now put your three GUID values plus desired brightness in percent - lets say 10% - like this:
And... nothing happened for me! The brightness didn't change! By executing
powercfg /q
I checked that indeed my new value was stored properly. So I just asked to make my power setting active (even though it was active all the time):And voila! my screen brightness dimmed to 10%!