dellL702X.sh

#!/bin/sh
# Power control for Dell L702X
# by Jos Hickson
# adapted from "Power control for DELL XPS L702X by Pete Eberlein"

if ! lsmod | grep -q acpi_call; then
    echo "Error: acpi_call module not loaded"
    exit
fi

acpi_call () {
    echo "$*" > /proc/acpi/call
    cat /proc/acpi/call
}


case "$1" in
off)
    echo _DSM $(acpi_call "\_SB.PCI0.PEG0.PEGP._DSM" \
	"{0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47," \
	 "0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0}" \
	 "0x100 0x1A {0x1,0x0,0x0,0x3}")
	# ok to turn off: Buffer {0x59 0x0 0x0 0x11}
	# is already off: Buffer {0x41 0x0 0x0 0x11}
    echo _PS3 $(acpi_call "\_SB.PCI0.PEG0.PEGP._PS3")
;;
on)
    echo _PS0 $(acpi_call "\_SB.PCI0.PEG0.PEGP._PS0")
;;
*)
    echo "Usage: $0 [on|off]"
esac


PSC=$(acpi_call "\_SB.PCI0.PEG0.PEGP._PSC")
#echo _PSC ${PSC}
case "$PSC" in
0x0)
    PSC="on"
;;
0x3)
    PSC="off"
;;
esac
echo "Dell L702X Optimus appears to be ${PSC}"