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[Martin Bångens <1448485@xxxxxxxxxxxxxxxxxx>]

I'm trying this bisect method for the first time and have compiled the
first kernel to test. don't close this bug! I'm not used to the ubuntu
way of building the kernel so be patient.

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Title:
  kernel don't recognize laptop backlight fn keys

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using Ubuntu 15.04 and fn+f7 and fn+f8 use to lower and higher the brightness of the screen.
  In slackware using kernel 3.14.33 those keys works and give output from acpi_listen.
  In kernel 3.16 to 4.0 those keys don't work and acpi_listen outputs nothing.

  I expected fn+f7 and fn+f8 to work

  https://bugzilla.kernel.org/show_bug.cgi?id=60670
  This bug my be related

  This is my first bug report.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15 [modified: boot/vmlinuz-3.19.0-15-generic]
  ProcVersionSignature: Ubuntu 3.19.0-15.15-lowlatency 3.19.3
  Uname: Linux 3.19.0-15-lowlatency x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  marbangens   1334 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Apr 25 17:04:30 2015
  HibernationDevice: RESUME=UUID=22f95b90-3ec0-4b6d-9e76-13042dc0a290
  InstallationDate: Installed on 2015-04-23 (1 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Hewlett-Packard Compaq Presario CQ60 Notebook PC
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-lowlatency root=UUID=d4f39d6b-137e-4248-81cb-ce920cdee909 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-lowlatency N/A
   linux-backports-modules-3.19.0-15-lowlatency  N/A
   linux-firmware                                1.143
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UdevLog: Error: [Errno 2] Filen eller katalogen finns inte: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/18/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.54
  dmi.board.name: 303C
  dmi.board.vendor: Wistron
  dmi.board.version: 08.60
  dmi.chassis.type: 10
  dmi.chassis.vendor: Wistron
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnHewlett-Packard:bvrF.54:bd08/18/2009:svnHewlett-Packard:pnCompaqPresarioCQ60NotebookPC:pvrF.54:rvnWistron:rn303C:rvr08.60:cvnWistron:ct10:cvrN/A:
  dmi.product.name: Compaq Presario CQ60 Notebook PC
  dmi.product.version: F.54
  dmi.sys.vendor: Hewlett-Packard

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