NVIDIA's 256.29 beta driver is available from this PPA: https://launchpad.net/~ubuntu-x-swat/+archive/x-updates . The issue is not solved, and I didn't expect it to be. Again, the bugs for both NVS *100m series and FX 880M have been reported to the NVIDIA developers @ nvnews.net, the links to those threads are in the description of this bug (bug 562005).
** Description changed: 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. + Because this issue is related to NVIDIA's proprietary video driver, this issue can only be solved by them. An NVIDIA developer has said he will investigate the issues, which are 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 . For future reference, the latest NVIDIA drivers can be found in the Ubuntu X-Swat X updates PPA: https://launchpad.net/~ubuntu-x-swat/+archive/x-updates + 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 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 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 SourcePackage: nvidia-graphics-drivers XorgLogOld: dmi.bios.date: 02/22/2010 dmi.bios.vendor: LENOVO - dmi.bios.version: 6MET49WW (1.12 ) + dmi.bios.version: 6MET49WW (1 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.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 -- 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 Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
