Matt White, as per http://download.lenovo.com/express/ddfm.html an update is available for your BIOS (2.53). If you update to this following https://help.ubuntu.com/community/BiosUpdate , does it change anything?
If not, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Thank you for your understanding. ** Description changed: - Following instructions on - https://wiki.kubuntu.org/Kernel/Debugging/Backlight - - I have tried in /etc/default/grub: kernel parameters + This laptop has Optimus. Following instructions on https://wiki.kubuntu.org/Kernel/Debugging/Backlight I have tried in /etc/default/grub kernel parameters: acpi_backlight=vendor, thinkpad-acpi.brightness_enable=1. I have tried /usr/share/X11/xorg.conf.d/10-brightness-control.conf: Option "RegistryDwords" "EnableBrightnessControl=1" I have tried editing /sys/class/backlight/acpi_video0/brightness with tee - None of these have enabled brightness control. If I boot with integrated - graphics instead of Nvidia, it works fine. (Note: this laptop has - Optimus). Any further suggestions? + None of these have enabled brightness control. + + WORKAROUND: If I boot with integrated graphics instead of Nvidia, it + works fine. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-18-generic 3.5.0-18.29 ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7 Uname: Linux 3.5.0-18-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC1: mwhite 2138 F.... pulseaudio - /dev/snd/controlC0: mwhite 2138 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC1: mwhite 2138 F.... pulseaudio + /dev/snd/controlC0: mwhite 2138 F.... pulseaudio Date: Tue Nov 27 23:39:07 2012 HibernationDevice: RESUME=UUID=c574cd15-a9b9-4064-b22e-62b5bf4ce531 InstallationDate: Installed on 2012-11-27 (0 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) MachineType: LENOVO 2359CTO MarkForUpload: True ProcEnviron: - TERM=xterm - PATH=(custom, no user) - XDG_RUNTIME_DIR=<set> - LANG=en_US.UTF-8 - SHELL=/bin/bash + TERM=xterm + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=en_US.UTF-8 + SHELL=/bin/bash ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic.efi.signed root=UUID=fdfd5708-06eb-454a-a3c7-bdd98054c811 ro quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.5.0-18-generic N/A - linux-backports-modules-3.5.0-18-generic N/A - linux-firmware 1.95 + linux-restricted-modules-3.5.0-18-generic N/A + linux-backports-modules-3.5.0-18-generic N/A + linux-firmware 1.95 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/13/2012 dmi.bios.vendor: LENOVO dmi.bios.version: G4ET62WW (2.04 ) dmi.board.asset.tag: Not Available dmi.board.name: 2359CTO dmi.board.vendor: LENOVO dmi.board.version: Win8 Pro DPK TPG dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2359CTO dmi.product.version: ThinkPad T530 dmi.sys.vendor: LENOVO ** Summary changed: - Brightness control doesn't work on Lenovo Thinkpad T530 + 10de:0def [Lenovo Thinkpad T530] With discrete graphics brightness control doesn't work ** Tags added: bios-outdated-2.56 ** Changed in: linux (Ubuntu) Importance: Medium => Low ** Changed in: linux (Ubuntu) Status: Triaged => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1083984 Title: 10de:0def [Lenovo Thinkpad T530] With discrete graphics brightness control doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1083984/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
