GRUB_CMDLINE_LINUX="acpi_osi=Linux"
GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
GRUB_CMDLINE_LINUX="acpi_osi=linux acpi_backlight=vendor"
GRUB_CMDLINE_LINUX="acpi_osi_Linux"

$ sudo lshw -C display
  *-display UNCLAIMED
       description: 3D controller
       product: GK107M [GeForce GT 750M]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: latency=0
       resources: memory:f6000000-f6ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:f7000000-f707ffff
  *-display
       description: VGA compatible controller
       product: 4th Gen Core Processor Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 06
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:50 memory:f7400000-f77fffff memory:d0000000-dfffffff ioport:f000(size=64)

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="

sudo emacs /etc/default/grub

sudo update-grub

acpi_listen.

video/brightnessdown BRTDN 00000087 00000000 K
video/brightnessup BRTUP 00000086 00000000 K

sudo emacs /etc/acpi/events/asus-keyboard-backlight-down

sudo emacs /etc/acpi/events/asus-keyboard-backlight-up

echo xx | sudo tee /sys/class/backlight/intel_backlight/brightness

sudo emacs /etc/acpi/asus-keyboard-backlight.sh

if [ "$1" = down ]; then
    VAL=$((VAL-10))
else
    VAL=$((VAL+10))
fi

sudo service acpid restart

sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf

sudo nano /usr/share/X11/xorg.conf.d/20-intel.conf

Section "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"  "intel_backlight"
        BusID       "PCI:0:2:0"
EndSection

sudo nano /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi= acpi_backlight=intel"

sudo update-grub

sudo nano /etc/acpi/asus-keyboard-backlight.sh

MIN=200
MAX=$(cat $KEYS_DIR/max_brightness)
VAL=$(cat $KEYS_DIR/brightness)

if [ "$1" = down ]; then
    VAL=$((VAL-800))
else
    VAL=$((VAL+800))
fi

sudo evemu-record /dev/input/event3

Section "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"  "intel_backlight"
        BusID       "PCI:0:2:0"
EndSection

linux-headers-4.9.0-997_4.9.0-997.201611212212_all.deb
  linux-headers-4.9.0-997-generic_4.9.0-997.201611212212_amd64.deb
  linux-image-4.9.0-997-generic_4.9.0-997.201611212212_amd64.deb

dpkg -i linux*.deb

setkeycodes e012 224

setkeycodes e017 225