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[Nuno <nmrcardoso@xxxxxxxxx>]

echo 8 > /sys/class/backlight/intel_backlight/brightness
-> Brightness changes
video.use_bios_initial_backlight=0 -> only applet works, fn+f5/fn+f6 not working
acpi_osi= -> neither works, fn+f5/fn+f6 or applet
video.use_native_backlight=1 -> only applet works, fn+f5/fn+f6 not working
this didn't work: /usr/share/X11/xorg.conf.d/80-backlight.conf

It seems a problem similar to the one in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1348890


** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1500094

Title:
  Asus UX303LB: Brightness keys Fn+F5 and Fn+F6 don't generate evdev
  event

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  It seems brightness keys don't work with Ubuntu 15.04 for laptop Asus
  Zenbook UX303LB. Also acpi_listen does not detect fn+f5 and fn+f6

  ---
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  nuno       1689 F.... pulseaudio
   /dev/snd/controlC0:  nuno       1689 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.04
  HibernationDevice: RESUME=UUID=b6aebadc-8f37-49d3-bd1e-e0171ac4c1ab
  InstallationDate: Installed on 2015-09-24 (5 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 064e:9700 Suyin Corp.
   Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK COMPUTER INC. UX303LB
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-28-generic.efi.signed root=UUID=a195a7ac-d5d1-4d1e-ab13-199a8b8533bb ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-28-generic N/A
   linux-backports-modules-3.19.0-28-generic  N/A
   linux-firmware                             1.143.3
  Tags:  vivid
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-28-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 08/24/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: UX303LB.206
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: UX303LB
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX303LB.206:bd08/24/2015:svnASUSTeKCOMPUTERINC.:pnUX303LB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX303LB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: UX303LB
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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