RC4 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-rc4-raring/
fixes the FN+f9 and FN+f10 behavior.

** Tags removed: kernel-bug-exists-upstream
** Tags added: kernel-fixed-upstream kernel-fixed-upstream-v3.7-rc4-raring 
regression-release

** Tags removed: regression-release

** Description changed:

  In HP Compaq 2510p laptop the FN-hotkeys for brightness control have no
  effect.
  
  FN+f9 is supposed to decrease brightness, but the brightness does not change. 
No message is displayed on screen.
  FN+f10 is supposed to increase brightness, but the brightness does not 
change. No message is displayed on screen.
- FN+f11 is supposed to turn light sensor (HP hardware lfor automatic 
brightness) on/off, but the light sensor does not activate. A message symbol 
similar to turning touchpad off is displayed on the screen (but touchpad state 
does not change).
  
  Brightness can be controlled from system settings / brightness and lock.
  Also brightness is changed during idle or power adapter plugged or
  unplugged.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-17-generic 3.5.0-17.28
  ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  leppis     2004 F.... pulseaudio
  Date: Sun Nov  4 10:21:36 2012
  HibernationDevice: RESUME=UUID=49ae27dd-896f-4082-9cd4-d8cb3b84a03b
  InstallationDate: Installed on 2012-10-10 (24 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120823.1)
  MachineType: Hewlett-Packard HP Compaq 2510p
  MarkForUpload: True
  PccardctlIdent:
   Socket 0:
     product info: "HP
   ", "PC Card Smart Card Reader
   ", "", ""
     manfid: 0xffff, 0x0001
  PccardctlStatus:
   Socket 0:
     5.0V
    16-bit
    PC Card
     Subdevice 0 (function 0) [unbound]
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic 
root=UUID=62599160-9cbb-4d52-bcc1-c301df6ead94 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-17-generic N/A
   linux-backports-modules-3.5.0-17-generic  N/A
   linux-firmware                            1.95
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/06/2010
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68MSP Ver. F.0F
  dmi.board.name: 30C9
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 75.28
  dmi.chassis.asset.tag: CZC82710H0
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: 
dmi:bvnHewlett-Packard:bvr68MSPVer.F.0F:bd07/06/2010:svnHewlett-Packard:pnHPCompaq2510p:pvrF.0F:rvnHewlett-Packard:rn30C9:rvrKBCVersion75.28:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP Compaq 2510p
  dmi.product.version: F.0F
  dmi.sys.vendor: Hewlett-Packard

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https://bugs.launchpad.net/bugs/1074823

Title:
  [HP Compaq 2510p] Brightness control FN-hotkeys have no effect

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