Delyan, are you able to force the NVIDIA proprietary driver to control the backlight? You can do this by adding
Option "RegistryDwords" "EnableBrightnessControl=1 to the "Devices" section of xorg.conf and then restarting. Also, does your backlight emit a buzz or humming noise when the brightness has been changed using the NVIDIA drivers? ** Summary changed: - Backlight controls on ThinkPad T510 and W510 no longer function when using proprietary drivers + Backlight controls of laptops with NVIDIA NVS 3100M no longer function while using proprietary drivers ** Tags added: 3100m nvs ** Summary changed: - Backlight controls of laptops with NVIDIA NVS 3100M no longer function while using proprietary drivers + Backlight controls of laptops with NVIDIA NVS and Quadro FX 880M GPUs no longer function while using proprietary drivers ** Tags added: 880m fx quadro ** Description changed: - The brightness controls on ThinkPad T510s and W510s work while running - Nouveau or when using a text mode VT, but not while running X and using - proprietary NVIDIA drivers. It is possible to force the nvidia driver - to control the backlight by adding [Option "RegistryDwords" - "EnableBrightnessControl=1"] to the "Devices" section of xorg.conf . - While this allows the backlight to be controlled, the increments are - inconsistent and often result in a buzzing noise from the LED backlight. - Since this did not occur while running nouveau or when switching in text - VT, something is wrong. + The brightness controls of laptops with NVIDIA NVS 3100M or Quadro FX + 880M GPUs work while running Nouveau or when using a text mode VT, but + not while running X and using proprietary NVIDIA drivers. It is + possible to force the NVIDIA driver to control the backlight by adding + [Option "RegistryDwords" "EnableBrightnessControl=1"] to the "Devices" + section of xorg.conf . While this allows the backlight to be controlled, + the increments are inconsistent and often result in a buzzing noise from + the LED backlight on Lenovo ThinkPad T510s and W510s. Since this did not + occur while running nouveau or when switching in text VT, something is + wrong. This bad backlight behaviour has been confirmed on ThinkPad models T510 and W510 with NVIDIA NVS 3100m and Quadro FX 880M chipsets, respectively, via http://www.thinkwiki.org/wiki/Category:T510 The issue is discussed on the nvnews.net forums at http://www.nvnews.net/vbulletin/showthread.php?t=145105 and http://www.nvnews.net/vbulletin/showthread.php?t=150069 . An NVIDIA developer has said he will investigate the issue. - ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: nvidia-current 195.36.15-0ubuntu2 ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1 Uname: Linux 2.6.32-19-generic x86_64 NonfreeKernelModules: nvidia Architecture: amd64 Date: Mon Apr 12 23:48:02 2010 DkmsStatus: - tp-smapi, 0.40, 2.6.32-19-generic, x86_64: installed - vboxnetadp, 3.1.6, 2.6.32-19-generic, x86_64: installed - vboxnetflt, 3.1.6, 2.6.32-19-generic, x86_64: installed - vboxdrv, 3.1.6, 2.6.32-19-generic, x86_64: installed - nvidia-current, 195.36.15, 2.6.32-19-generic, x86_64: installed + tp-smapi, 0.40, 2.6.32-19-generic, x86_64: installed + vboxnetadp, 3.1.6, 2.6.32-19-generic, x86_64: installed + vboxnetflt, 3.1.6, 2.6.32-19-generic, x86_64: installed + vboxdrv, 3.1.6, 2.6.32-19-generic, x86_64: installed + nvidia-current, 195.36.15, 2.6.32-19-generic, x86_64: installed EcryptfsInUse: Yes GdmLog1: - + Lsusb: - Bus 002 Device 002: ID 8087:0020 - Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub - Bus 001 Device 003: ID 17ef:480f Lenovo - Bus 001 Device 002: ID 8087:0020 - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 002 Device 002: ID 8087:0020 + Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 001 Device 003: ID 17ef:480f Lenovo + Bus 001 Device 002: ID 8087:0020 + Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 4313CTO ProcCmdLine: BOOT_IMAGE=/bhostnamet/vmlinuz-2.6.32-19-generic rhostnamet=UUID=0b95b314-337f-49aa-86f9-6423e76e9f20 ro ProcEnviron: - LANG=en_CA.utf8 - SHELL=/bin/bash + LANG=en_CA.utf8 + SHELL=/bin/bash SourcePackage: nvidia-graphics-drivers XorgLogOld: - + dmi.bios.date: 02/22/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6MET49WW (1.12 ) 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:bvr6MET49WW(1.12):bd02/22/2010:svnLENOVO:pn4313CTO:pvrThinkPadT510:rvnLENOVO:rn4313CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4313CTO dmi.product.version: ThinkPad T510 dmi.sys.vendor: LENOVO system: - distro: Ubuntu - codename: lucid - architecture: x86_64 - kernel: 2.6.32-19-generic + distro: Ubuntu + codename: lucid + architecture: x86_64 + kernel: 2.6.32-19-generic -- Backlight controls of laptops with NVIDIA NVS and Quadro FX 880M GPUs no longer function while using proprietary drivers https://bugs.launchpad.net/bugs/562005 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
