Display brightness is not adjustable

[encmonkey]

Fully updated fresh install of 12.04 on Lenovo T510 laptop with the nvidia graphics card. Standard keyboard (fn+home/end) are responsive from the gui, but no change occurs. Using the brightness tool in the settings is also ineffective. Attempted numerous fixes found online (grub entry, xorg.conf entry, etc.) but no positive effect.

Thanks,
-ian

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-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 295.40 Thu Apr 5 21:37:00 PDT 2012
 GCC version: gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
.tmp.unity.support.test.0:

ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Fri May 18 09:22:12 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 295.40, 3.2.0-23-generic, x86_64: installed
 nvidia-current, 295.40, 3.2.0-24-generic, x86_64: installed
 vboxhost, 4.1.14, 3.2.0-24-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 NVIDIA Corporation GT218 [NVS 3100M] [10de:0a6c] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21d7]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
JockeyStatus:
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
 xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
MachineType: LENOVO 4313CTO
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=68083b15-ece1-47db-b19f-54a8ec1cab53 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/29/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6MET75WW (1.35 )
dmi.board.name: 4313CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6MET75WW(1.35):bd09/29/2010:svnLENOVO:pn4313CTO:pvrThinkPadT510:rvnLENOVO:rn4313CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4313CTO
dmi.product.version: ThinkPad T510
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.7.8-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.1
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 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[encmonkey (ian-gonesailing)]

Update to bug issue:

I can alter the brightness of the screen as the bios boots, but once
Ubuntu is up, I can no longer adjust it.

Thanks,
-ian

On 05/18/2012 09:37 AM, encmonkey wrote:
> Public bug reported:
>
> Fully updated fresh install of 12.04 on Lenovo T510 laptop with the
> nvidia graphics card. Standard keyboard (fn+home/end) are responsive
> from the gui, but no change occurs. Using the brightness tool in the
> settings is also ineffective. Attempted numerous fixes found online
> (grub entry, xorg.conf entry, etc.) but no positive effect.
>
> Thanks,
> -ian
>
> ProblemType: Bug
> DistroRelease: Ubuntu 12.04
> Package: xorg 1:7.6+12ubuntu1
> ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
> Uname: Linux 3.2.0-24-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 295.40 Thu Apr 5 21:37:00 PDT 2012
> GCC version: gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
> .tmp.unity.support.test.0:
>
> ApportVersion: 2.0.1-0ubuntu7
> Architecture: amd64
> CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
> CompositorRunning: compiz
> Date: Fri May 18 09:22:12 2012
> DistUpgraded: Fresh install
> DistroCodename: precise
> DistroVariant: ubuntu
> DkmsStatus:
> nvidia-current, 295.40, 3.2.0-23-generic, x86_64: installed
> nvidia-current, 295.40, 3.2.0-24-generic, x86_64: installed
> vboxhost, 4.1.14, 3.2.0-24-generic, x86_64: installed
> EcryptfsInUse: Yes
> ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
> GraphicsCard:
> NVIDIA Corporation GT218 [NVS 3100M] [10de:0a6c] (rev a2) (prog-if 00 [VGA controller])
> Subsystem: Lenovo Device [17aa:21d7]
> InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
> JockeyStatus:
> xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
> xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
> MachineType: LENOVO 4313CTO
> ProcEnviron:
> PATH=(custom, no user)
> LANG=en_US.UTF-8
> SHELL=/bin/bash
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=68083b15-ece1-47db-b19f-54a8ec1cab53 ro quiet splash vt.handoff=7
> SourcePackage: xorg
> Symptom: display
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 09/29/2010
> dmi.bios.vendor: LENOVO
> dmi.bios.version: 6MET75WW (1.35 )
> dmi.board.name: 4313CTO
> dmi.board.vendor: LENOVO
> dmi.board.version: Not Available
> dmi.chassis.asset.tag: No Asset Information
> dmi.chassis.type: 10
> dmi.chassis.vendor: LENOVO
> dmi.chassis.version: Not Available
> dmi.modalias: dmi:bvnLENOVO:bvr6MET75WW(1.35):bd09/29/2010:svnLENOVO:pn4313CTO:pvrThinkPadT510:rvnLENOVO:rn4313CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
> dmi.product.name: 4313CTO
> dmi....

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Axel Liedtke (axel-liedtke)]

I had the very same issue with my T510 and adding the line

Option "RegistryDwords" "EnableBrightnessControl=1"

within the 'Section "Device"' solved the problem for me.

[encmonkey (ian-gonesailing)]

Thanks Axel, that worked perfectly!

[Scott Lanham (scott-mail)]

I have just installed XUbuntu 12.04 on an Asus G55VW and have the same problem. None of the current work arounds of setting boot params or changing xorg.conf have fixed the issue for me.

[dimovnike (dimovnike)]

confirmed on Asus G55VW, the brighness works only with nvidiabl module, the fn keys dont even issue a keycode when checkign with xev.