Centos 7 brightness control not working

[VigilanteX]

Hi, I need help regarding my centos 7 distribution as brightness control is not working. Please help asap;->

 

[KGIII]

What is your graphics card? What drivers do you have installed? What have you tried? How has it not worked? What errors did it throw?

In other words, we're not psychics. Help us help you. We need far more information than you've given us.