> Brightness keys don't work without disabling a kernel module. Why brightness in every laptop is software controlled? I am so frustrated when every time I pre

> Brightness keys don't work without disabling a kernel module. Why brightness in every laptop is software controlled? I am so frustrated when every time I press brightness+ or brightness- on my Linux laptop, the desired effect comes after 5-10 seconds just because my CPU is busy by something else. If I have 20 steps of brightness then changing from minimum to maximum or vice versa is never less than a minute.