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[Anthony Wong <anthony.wong@xxxxxxxxxx>]

** Changed in: hwe-next
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1359010

Title:
  [HP Probook 6570b] Unable to control brightness on 12.04.5

Status in HWE Next Project:
  Fix Released
Status in linux-lts-trusty package in Ubuntu:
  Fix Released

Bug description:
  CID: 201306-13745 HP Probook 6570b

  This system was certified with 12.04.2 [1], but the brightness does not work on 12.04.5
  The brightness level indicator would change with hotkey events, but the brightness itself does not.

  Debugging information:
  ubuntu@201306-13745:~$ ls /sys/class/backlight
  acpi_video0  intel_backlight

  ubuntu@201306-13745:~$ grep -r . /proc/acpi
  /proc/acpi/battery/BAT1/alarm:present:                 no
  /proc/acpi/battery/BAT1/state:present:                 no
  /proc/acpi/battery/BAT1/info:present:                 no
  /proc/acpi/battery/BAT0/alarm:alarm:                   unsupported
  /proc/acpi/battery/BAT0/state:present:                 yes
  /proc/acpi/battery/BAT0/state:capacity state:          ok
  /proc/acpi/battery/BAT0/state:charging state:          charged
  /proc/acpi/battery/BAT0/state:present rate:            0 mA
  /proc/acpi/battery/BAT0/state:remaining capacity:      4907 mAh
  /proc/acpi/battery/BAT0/state:present voltage:         12435 mV
  /proc/acpi/battery/BAT0/info:present:                 yes
  /proc/acpi/battery/BAT0/info:design capacity:         4932 mAh
  /proc/acpi/battery/BAT0/info:last full capacity:      4932 mAh
  /proc/acpi/battery/BAT0/info:battery technology:      rechargeable
  /proc/acpi/battery/BAT0/info:design voltage:          10800 mV
  /proc/acpi/battery/BAT0/info:design capacity warning: 200 mAh
  /proc/acpi/battery/BAT0/info:design capacity low:     100 mAh
  /proc/acpi/battery/BAT0/info:cycle count:		  0
  /proc/acpi/battery/BAT0/info:capacity granularity 1:  100 mAh
  /proc/acpi/battery/BAT0/info:capacity granularity 2:  100 mAh
  /proc/acpi/battery/BAT0/info:model number:            Primary
  /proc/acpi/battery/BAT0/info:serial number:           59312 2013/03/07
  /proc/acpi/battery/BAT0/info:battery type:            LIon
  /proc/acpi/battery/BAT0/info:OEM info:                Hewlett-Packard
  /proc/acpi/button/lid/LID/state:state:      open
  /proc/acpi/wakeup:Device	S-state	  Status   Sysfs node
  /proc/acpi/wakeup:LANC	  S5	*enabled   pci:0000:00:19.0
  /proc/acpi/wakeup:EHC1	  S0	*enabled   pci:0000:00:1d.0
  /proc/acpi/wakeup:EHC2	  S0	*enabled   pci:0000:00:1a.0
  /proc/acpi/wakeup:XHC	  S0	*enabled   pci:0000:00:14.0
  /proc/acpi/wakeup:PCIB	  S5	*disabled
  /proc/acpi/wakeup:RP02	  S4	*disabled  pci:0000:00:1c.1
  /proc/acpi/wakeup:ECF0	  S4	*disabled
  /proc/acpi/wakeup:RP03	  S4	*disabled  pci:0000:00:1c.2
  /proc/acpi/wakeup:RP04	  S5	*disabled  pci:0000:00:1c.3
  /proc/acpi/wakeup:WNIC	  S5	*disabled  pci:0000:24:00.0

  ubuntu@201306-13745:~$ dmesg | grep 'ACPI: Video'
  [    9.589102] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
  ubuntu@201306-13745:~$ 




  [1] http://www.ubuntu.com/certification/hardware/201306-13745/

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.13.0-34-generic 3.13.0-34.60~precise1
  ProcVersionSignature: Ubuntu 3.13.0-34.60~precise1-generic 3.13.11.4
  Uname: Linux 3.13.0-34-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-34-generic.
  ApportVersion: 2.0.1-0ubuntu17.7
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1919 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xd4730000 irq 49'
     Mixer name	: 'Intel PantherPoint HDMI'
     Components	: 'HDA:111d7605,103c17b7,00100107 HDA:80862806,80860101,00100000'
     Controls      : 53
     Simple ctrls  : 18
  Date: Tue Aug 19 22:32:50 2014
  HibernationDevice: RESUME=UUID=40b3ec1e-30dd-4f84-97d0-50cc592094bd
  InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
  MachineType: Hewlett-Packard HP ProBook 6570b
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-34-generic root=UUID=3a68144b-91cb-46a6-9be4-cec8c83f33d7 ro quiet splash initcall_debug vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-34-generic N/A
   linux-backports-modules-3.13.0-34-generic  N/A
   linux-firmware                             1.79.16
  SourcePackage: linux-lts-trusty
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/31/2013
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68ICE Ver. F.40
  dmi.board.name: 17AB
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 42.32
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68ICEVer.F.40:bd01/31/2013:svnHewlett-Packard:pnHPProBook6570b:pvrA1029D1102:rvnHewlett-Packard:rn17AB:rvrKBCVersion42.32:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ProBook 6570b
  dmi.product.version: A1029D1102
  dmi.sys.vendor: Hewlett-Packard

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