Kernel 4.15 enables keyboard backlight control for me (GL553VE). No more
kernel patching needed.

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  Asus GL553VE laptop keyboard backlight uncontrollable and Fn keys not

Status in linux package in Ubuntu:

Bug description:
  There are problems with Asus GL553VE laptop Fn buttons and keyboard backlight
  1) Keyboard backlight uncontrollable
  2) Most FN keys don't work

  There is no way to control keyboard backlight at all (already tried
  all possible ways found in internet)

  Missing /sys/class/leds/asus::kbd_backlight (asus-nb-wmi modprobed)

  try all possible variants with acpi_osi and acpi_backlight from forum
  - no effect.

  Install kernel 4.9 and even 4.10 latest RC - no effect (only got
  control over airplane led).

  Keyboard backlight is always on or always off (last state from windows)
  Fn keys not working:
  F1(Zz Suspend) F2(Airplane) F3(Kb brightness down) F4(Kb brightness up)  
F5(Brightness down) F6(Brightness up) F7(Screen dim) F9(Touchpad disable)
  Workjng: Sound Mute + - (F10 F11 F12)

  Monitor backlight working fine by using menu slider.

  Tested on open and proprietary drivers from latest ppas

  lsb_release -rd
  Description:    Ubuntu 16.04.1 LTS
  Release:        16.04

  Suggestion: asus-nb-wmi kernel module unable to detect hardware

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-62-generic 4.4.0-62.83
  ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
  Uname: Linux 4.4.0-62-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
   /dev/snd/controlC0:  cabalbl4   1713 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Mon Feb  6 23:18:11 2017
  HibernationDevice: RESUME=UUID=6ab6365a-c88a-4e64-a529-83b6a9a70e4e
  InstallationDate: Installed on 2017-02-05 (1 days ago)
  InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 8087:0a2a Intel Corp.
   Bus 001 Device 002: ID 0bda:57f5 Realtek Semiconductor Corp.
   Bus 001 Device 004: ID 0b05:1854 ASUSTek Computer, Inc.
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-62-generic.efi.signed 
root=UUID=18b6e8b1-63c2-4fb9-bdbb-5f9ffcc2d4cf ro quiet splash acpi_osi=Linux 
   linux-restricted-modules-4.4.0-62-generic N/A
   linux-backports-modules-4.4.0-62-generic  N/A
   linux-firmware                            1.157.6
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install) 11/08/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: GL553VE.208
  dmi.board.asset.tag: ATN12345678901234567 GL553VE
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No  Asset  Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
dmi:bvnAmericanMegatrendsInc.:bvrGL553VE.208:bd11/08/2016:svnASUSTeKCOMPUTERINC.:pnGL553VE:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnGL553VE:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: GL553VE
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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