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[postadelmaga <postadelmaga@xxxxxxxxx>]

Same issue on 4.0.0-040000rc7-generic

** Tags added: kernel-bug-exists-upstream

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https://bugs.launchpad.net/bugs/1447869

Title:
  Brightness FN  keys Not working - Dell

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  The Brightness FN keys (fn+f4 and fn+f5) once pressed don't generate
  any `evdev`, this happens on some Dell laptops like Inspiron 14z
  (N411z), Dell XPS 13.

  It has been reported in the past but the old bugs look abandoned.

  This functionality was working fine before and according with old bug
  report was probably introduced with Ubuntu 13.04.

  Any chance to get it fixed/reverted ?

  Old bug with more info:
  - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1229591
  - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/954661 (unsupported)
  - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1280394 (duplicated)
  --- 
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  fra        3202 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.04
  HibernationDevice: RESUME=UUID=5b95e473-75da-434b-9123-66887ff65f11
  InstallationDate: Installed on 2014-03-10 (410 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140309)
  MachineType: Dell Inc. Dell System Inspiron N411Z
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-9-generic root=/dev/mapper/ubuntu--vg-lv_root ro quiet splash acpi_backlight=vendor intel_pstate=enable vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-9-generic N/A
   linux-backports-modules-3.19.0-9-generic  N/A
   linux-firmware                            1.143
  Tags:  vivid
  UdevLog:
   
  Uname: Linux 3.19.0-9-generic x86_64
  UpgradeStatus: Upgraded to vivid on 2015-03-20 (34 days ago)
  UserGroups: adm cdrom debian-tor dip disk libvirtd lpadmin plugdev sambashare sudo www-data
  _MarkForUpload: True
  dmi.bios.date: 09/10/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 0P01VP
  dmi.board.vendor: Dell Inc.
  dmi.board.version: FAB1
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd09/10/2012:svnDellInc.:pnDellSystemInspironN411Z:pvr:rvnDellInc.:rn0P01VP:rvrFAB1:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System Inspiron N411Z
  dmi.sys.vendor: Dell Inc.

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