It seems that the brightness control of Clevo is a tough nut to crack.
I have a similar problem. here
@generix hey bro, can you tell me can you tell me what these command " echo '\_SB.PCI0.GFX0.LCD0._BCM 0x1e' > /proc/acpi/call" " echo '\_SB.PCI0.PEG0.PEGP.LCD0._BCM 0x1e' > /proc/acpi/call" did?
I will try it in my laptop, maybe it has different effects in pascal card.