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[Bug 1169409] Re: [HP Pavilion 23] Brightness control doesn't work.


Hello Acelan,

in reply to my comment #11, on 201208-11466,
there is only one acpi_video0 in /sys/class/backlight

but please ignore comment #3
I think 201208-11466 it's not affected by this.

** Tags removed: 201208-11466

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  [HP Pavilion 23] Brightness control doesn't work.

Status in HWE Next Project:
Status in “linux” package in Ubuntu:

Bug description:
  CID: 201206-11410
  The brightness control seems not working (although the brightness looks fine on this computer).
  Neither installing the proprietary driver, kernel update nor disabling the ACPI backlight driver would solve this.

  1. Open System Settings
  2. Select Brightness and Lock
  3. Adjust the brightness with the scroll bar.

  1. Press the brightness key on the keyboard.

  Expected result:
  The screen brightness should change.

  Actual result:
  The screen brightness doesn't change.
  And if using the brightness key to control it, can only lower the brightness level of the indicator, but not raising it.
  (The screen brightness remain the same.)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.5.0-23-generic 3.5.0-23.35~precise1
  ProcVersionSignature: Ubuntu 3.5.0-23.35~precise1-generic
  Uname: Linux 3.5.0-23-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
   **** List of PLAYBACK Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu17.1
  Architecture: amd64
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC0:  ubuntu     1563 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf7300000 irq 50'
     Mixer name	: 'Realtek ALC269VC'
     Components	: 'HDA:10ec0269,103c2aed,00100202'
     Controls      : 21
     Simple ctrls  : 10
  Date: Tue Apr 16 00:53:44 2013
  HibernationDevice: RESUME=UUID=a4bdae84-e104-4f58-97c3-e9760fa4fde7
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
   eth0      no wireless extensions.

   lo        no wireless extensions.
  MachineType: Hewlett-Packard 23-1901
  MarkForUpload: True
   PATH=(custom, no user)
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-23-generic root=UUID=6f502a3e-870b-4939-b93b-e6692e39cb24 ro quiet splash initcall_debug vt.handoff=7
   linux-restricted-modules-3.5.0-23-generic N/A
   linux-backports-modules-3.5.0-23-generic  N/A
   linux-firmware                            1.79.1

  SourcePackage: linux
  StagingDrivers: rts_pstor
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/04/2012
  dmi.bios.vendor: AMI
  dmi.bios.version: 8.07
  dmi.board.name: 2AED
  dmi.board.vendor: PEGATRON CORPORATION
  dmi.board.version: 1.02
  dmi.chassis.type: 3
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnAMI:bvr8.07:bd09/04/2012:svnHewlett-Packard:pn23-1901:pvr1.00:rvnPEGATRONCORPORATION:rn2AED:rvr1.02:cvnHewlett-Packard:ct3:cvr:
  dmi.product.name: 23-1901
  dmi.product.version: 1.00
  dmi.sys.vendor: Hewlett-Packard

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