** 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.
  
  Brightness can be controlled from system settings / brightness and lock.
  Also brightness is changed during idle or power adapter plugged or
  unplugged.
  
+ Reverse mainline kernel version bisecting revealed:
+ kernel-bug-exists-upstream-v3.7-rc3-raring
+ kernel-fixed-upstream-v3.7-rc4-raring
+ 
  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
+  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
+  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]
+  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
+  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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