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[Jonathan Davies <jonathan.davies@xxxxxxxxxxxxx>]

** Attachment added: "ssdt2.dat"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1303419/+attachment/4070116/+files/ssdt2.dat

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https://bugs.launchpad.net/bugs/1303419

Title:
  Brightness keys don't work on HP Elitebook Folio 1040 G1

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  The brightness keys (F9, F10) don't work on HP Elitebook Folio 1040
  G1. The keyboard backlight key at F11 works fine though.

  Known workaround (2014-04-06): Use "acpi_backlight=vendor"/3.13.x+
  series kernel use: "video.use_native_backlight=1 as a boot option.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-23-generic 3.13.0-23.45 [modified: boot/vmlinuz-3.13.0-23-generic]
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  Uname: Linux 3.13.0-23-generic x86_64
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jpds       3933 F.... pulseaudio
   /dev/snd/controlC0:  jpds       3933 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Apr  6 18:37:24 2014
  HibernationDevice: RESUME=UUID=05490d4c-6800-46a1-b5ba-8b32bdc57e89
  InstallationDate: Installed on 2014-04-06 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406)
  MachineType: Hewlett-Packard HP EliteBook Folio 1040 G1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-23-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-23-generic N/A
   linux-backports-modules-3.13.0-23-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/09/2014
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: L83 Ver. 01.05
  dmi.board.name: 213E
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 24.2A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrL83Ver.01.05:bd02/09/2014:svnHewlett-Packard:pnHPEliteBookFolio1040G1:pvrA3009DD18303:rvnHewlett-Packard:rn213E:rvrKBCVersion24.2A:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook Folio 1040 G1
  dmi.product.version: A3009DD18303
  dmi.sys.vendor: Hewlett-Packard

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