Public bug reported:

Brightness of my hp mini netbook is stuck up at maximum level.
The function keys for brightness control are not working.
I have Ubuntu 12.04 LTS installed . . .

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-23-generic-pae 3.2.0-23.36
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu5
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  nitish     2517 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0x84100000 irq 44'
   Mixer name   : 'IDT 92HD87B2/4'
   Components   : 'HDA:111d76d9,103c338d,00100107'
   Controls      : 16
   Simple ctrls  : 9
Date: Mon Feb 11 11:47:24 2013
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MachineType: Hewlett-Packard HP Mini 210-4000
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:
 
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic-pae 
root=UUID=DA98E62F98E609B9 loop=/hostname/disks/root.disk ro quiet splash 
acpi_backlight=vendor vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-23-generic-pae N/A
 linux-backports-modules-3.2.0-23-generic-pae  N/A
 linux-firmware                                1.79
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/14/2012
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.07
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 338D
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 37.19
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnHewlett-Packard:bvrF.07:bd11/14/2012:svnHewlett-Packard:pnHPMini210-4000:pvr0797200000204600000300100:rvnHewlett-Packard:rn338D:rvr37.19:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Mini 210-4000
dmi.product.version: 0797200000204600000300100
dmi.sys.vendor: Hewlett-Packard

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 precise

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https://bugs.launchpad.net/bugs/1121760

Title:
  Brightness controls not working.

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