hello every one i patch my dtst file to get work my brightness control
by adding :

Device (PNLF)

{

Name (_HID, EisaId ("APP0002"))

Name (_CID, "backlight")

Name (_UID, 0x0A)

Name (_STA, 0x0B)

}

in dtsdt file and it work 100%

but the problem is when i restart the pc the brightness go back to 100% and i need to adjusted again

can same body help me please

i have intel x4500 mhd graphique card