Exactly. Plus: Switching back and forth several times results in the X server hanging (or rather lagging) for some minutes…
On Sun, Jul 3, 2011 at 13:28, Tom Gelinas <562...@bugs.launchpad.net> wrote: > I have linked this bug to Ubuntu Hardware Certification. > https://answers.launchpad.net/ubuntu-certification/+question/163597 > > Hopefully they will treat this bug with respect. Switching between text > mode VT and a Nvidia-proprietary powered X server is not stable! > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/562005 > > Title: > Backlight controls of laptops with NVIDIA NVS and Quadro FX 880M GPUs > no longer function while using proprietary drivers > > Status in “nvidia-graphics-drivers” package in Ubuntu: > Confirmed > > Bug description: > 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 > 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: > nvidia-current, 195.36.15, 2.6.32-19-generic, x86_64: installed > EcryptfsInUse: Yes > GdmLog1: > > 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 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 > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/562005/+subscriptions > -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/562005 Title: Backlight controls of laptops with NVIDIA NVS and Quadro FX 880M GPUs no longer function while using proprietary drivers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/562005/+subscriptions _______________________________________________ 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
