Public bug reported:

/sys/class/leds $ ls
asus-wireless::airplane  input10::capslock  input10::compose  input10::kana  
input10::numlock  input10::scrolllock  input4::capslock  input4::numlock  
input4::scrolllock  phy0-led


There isn't any asus kbd backlight folder. `xset led off` doesn't work for me.
And I can only use fn to control volume (f1/f2/f3).

The leds kills my battery


$ sudo dmidecode -t 1; lsb_release -a

# dmidecode 3.1
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.

Handle 0x0001, DMI type 1, 27 bytes
System Information
 Manufacturer: ASUSTeK COMPUTER INC.
 Product Name: FX503VD
 Version: 1.0
 Serial Number: H9NRCX00M803374
 UUID: 524E3948-5843-3030-4D38-303333373441
 Wake-up Type: Power Switch
 SKU Number:
 Family: FX

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Cosmic Cuttlefish (development branch)
Release: 18.10
Codename: cosmic

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: xorg 1:7.7+19ubuntu8
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
Uname: Linux 4.18.0-10-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] 是一个目录: 
'/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  390.87  Tue Aug 21 12:33:05 
PDT 2018
 GCC version:  gcc version 8.2.0 (Ubuntu 8.2.0-7ubuntu1)
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
BootLog: Error: [Errno 13] 权限不够: '/var/log/boot.log'
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 15 17:13:35 2018
DistUpgraded: Fresh install
DistroCodename: cosmic
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 390.87, 4.18.0-10-generic, x86_64: installed
 nvidia, 390.87, 4.18.0-9-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:1b90]
   Subsystem: ASUSTeK Computer Inc. GP107M [GeForce GTX 1050 Mobile] [1043:1b90]
InstallationDate: Installed on 2018-10-10 (4 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Beta amd64 (20180927)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 0b05:1869 ASUSTek Computer, Inc. 
 Bus 001 Device 003: ID 13d3:5666 IMC Networks 
 Bus 001 Device 002: ID 8087:0a2b Intel Corp. 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. FX503VD
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic 
root=UUID=ad490863-aaf6-49d0-8508-514c07335e07 ro nouveau.runpm=0
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/03/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: FX503VD.302
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: FX503VD
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.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrFX503VD.302:bd10/03/2017:svnASUSTeKCOMPUTERINC.:pnFX503VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnFX503VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: FX
dmi.product.name: FX503VD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.95-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug cosmic fn-keys kernel-bug ubuntu

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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/1797862

Title:
  Fn keys doesn't work completely.Cannot turn off keyboard
  backlight.Unable to control screen brightness via fn keys

Status in xorg package in Ubuntu:
  New

Bug description:
  /sys/class/leds $ ls
  asus-wireless::airplane  input10::capslock  input10::compose  input10::kana  
input10::numlock  input10::scrolllock  input4::capslock  input4::numlock  
input4::scrolllock  phy0-led

  
  There isn't any asus kbd backlight folder. `xset led off` doesn't work for me.
  And I can only use fn to control volume (f1/f2/f3).

  The leds kills my battery

  
  $ sudo dmidecode -t 1; lsb_release -a

  # dmidecode 3.1
  Getting SMBIOS data from sysfs.
  SMBIOS 3.0.0 present.

  Handle 0x0001, DMI type 1, 27 bytes
  System Information
   Manufacturer: ASUSTeK COMPUTER INC.
   Product Name: FX503VD
   Version: 1.0
   Serial Number: H9NRCX00M803374
   UUID: 524E3948-5843-3030-4D38-303333373441
   Wake-up Type: Power Switch
   SKU Number:
   Family: FX

  No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu Cosmic Cuttlefish (development branch)
  Release: 18.10
  Codename: cosmic

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: xorg 1:7.7+19ubuntu8
  ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
  Uname: Linux 4.18.0-10-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] 是一个目录: 
'/proc/driver/nvidia/gpus/0000:01:00.0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  390.87  Tue Aug 21 12:33:05 
PDT 2018
   GCC version:  gcc version 8.2.0 (Ubuntu 8.2.0-7ubuntu1)
  ApportVersion: 2.20.10-0ubuntu11
  Architecture: amd64
  BootLog: Error: [Errno 13] 权限不够: '/var/log/boot.log'
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Oct 15 17:13:35 2018
  DistUpgraded: Fresh install
  DistroCodename: cosmic
  DistroVariant: ubuntu
  DkmsStatus:
   nvidia, 390.87, 4.18.0-10-generic, x86_64: installed
   nvidia, 390.87, 4.18.0-9-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:1b90]
     Subsystem: ASUSTeK Computer Inc. GP107M [GeForce GTX 1050 Mobile] 
[1043:1b90]
  InstallationDate: Installed on 2018-10-10 (4 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Beta amd64 (20180927)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 0b05:1869 ASUSTek Computer, Inc. 
   Bus 001 Device 003: ID 13d3:5666 IMC Networks 
   Bus 001 Device 002: ID 8087:0a2b Intel Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK COMPUTER INC. FX503VD
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic 
root=UUID=ad490863-aaf6-49d0-8508-514c07335e07 ro nouveau.runpm=0
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/03/2017
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: FX503VD.302
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: FX503VD
  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.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrFX503VD.302:bd10/03/2017:svnASUSTeKCOMPUTERINC.:pnFX503VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnFX503VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.family: FX
  dmi.product.name: FX503VD
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.95-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3

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