Brightness keyboard hotkeys do not work for the HP Pavilion dv3510nr (dv3000) in Ubuntu 12.04

[Stephen Ostrow]

When hitting the brightness keyboard hot keys a notification comes up displaying the the brightness is changing; however the actual screen brightness never changes.

By going into NVidia's control panel I'm able to manually change the screen brightness.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 295.49 Mon Apr 30 23:46:33 PDT 2012
 GCC version: gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
.tmp.unity.support.test.0:

ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,gnomecompat,move,vpswitch,grid,regex,imgpng,mousepoll,resize,compiztoolbox,place,snap,animation,session,unitymtgrabhandles,workarounds,screenshot,wall,expo,ezoom,fade,scale,unityshell]
CompositorRunning: compiz
Date: Mon Jun 25 11:09:58 2012
DistUpgraded: 2012-06-07 17:37:42,096 DEBUG enabling apt cron job
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current-updates, 295.49, 3.2.0-25-generic, x86_64: installed
 virtualbox, 4.1.12, 3.2.0-24-generic, x86_64: installed
 virtualbox, 4.1.12, 3.2.0-25-generic, x86_64: installed
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 NVIDIA Corporation G98 [GeForce 9300M GS] [10de:06e9] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1505]
JockeyStatus:
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use)
 xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Enabled, In use)
MachineType: Hewlett-Packard HP Pavilion dv3500 Notebook PC
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: root=UUID=34ce2b6b-d74a-4864-b47a-51ee0d304a2b ro quiet splash
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to precise on 2012-06-07 (17 days ago)
dmi.bios.date: 05/04/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.15
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1505
dmi.board.vendor: Inventec
dmi.board.version: KBC Version 13.14
dmi.chassis.asset.tag: CNU921378L
dmi.chassis.type: 10
dmi.chassis.vendor: Inventec
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.15:bd05/04/2009:svnHewlett-Packard:pnHPPaviliondv3500NotebookPC:pvrF.15:rvnInventec:rn1505:rvrKBCVersion13.14:cvnInventec:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv3500 Notebook PC
dmi.product.version: F.15
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.7.8-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.19.0-0ubuntu1~xup1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[J Phani Mahesh (phanimahesh)]

Just a note, did you try passing kernel argument 'acpi_backlight=vendor'? In some cases, this solves the problem.

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.