This should be fixed in the upstream 3.14-rc4 kernel by these two commits: commit bd8ba20597f0cfef3ef65c3fd2aa92ab23d4c8e1 - ACPI / video: Filter the _BCL table for duplicate brightness values commit 0e9f81d3b7cd0649a3bc437391b6a0650f98f844 - ACPI / video: Add systems that should favour native backlight interface
The first one has been cc'd to the stable kernel series. A PPA of the 3.14-rc4 kernel is available at http://kernel.ubuntu.com/~kernel- ppa/mainline/ and instructions on how to install an uninstall it are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1227188 Title: brightness doesn't work on Lenovo IdeaPad Yoga 13 Status in “linux” package in Ubuntu: Incomplete Bug description: Similar to bug 11588934, I get acpi_video0 & intel_backlight, or (ideapad & intel_backlight) depending on the osi_* kernel cmd line settings. The one that is preferred / used (acpi_video0 / ideapad) do not work. Whereas intel_backlight is the one that does work. I have Lenovo IdeaPad Yoga 13. I have now specified: /etc/X11/xorg.conf.d/backlight.conf Section "Device" Identifier "Device0" Option "Backlight" "intel_backlight" EndSection I guess a similar blacklist as was applied for HP should be applied in upstream kernel for Yoga? Regards, Dmitrijs. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: xorg 1:7.7+1ubuntu5 ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7 Uname: Linux 3.11.0-4-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.12.1-0ubuntu3 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true Date: Wed Sep 18 09:54:16 2013 DistUpgraded: Fresh install DistroCodename: saucy DistroVariant: ubuntu ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:3977] InstallationDate: Installed on 2013-08-29 (20 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130829) MachineType: LENOVO 2191 MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-4-generic.efi.signed root=UUID=5c176060-d588-4044-87b6-50b785b931b1 ro quiet splash acpi_backlight=legacy acpi_osi=Linux vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/21/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 66CN54WW dmi.board.asset.tag: No Asset Tag dmi.board.name: INVALID dmi.board.vendor: LENOVO dmi.board.version: 31900003WIN8 STD MLT dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo IdeaPad Yoga 13 dmi.modalias: dmi:bvnLENOVO:bvr66CN54WW:bd01/21/2013:svnLENOVO:pn2191:pvrLenovoIdeaPadYoga13:rvnLENOVO:rnINVALID:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoIdeaPadYoga13: dmi.product.name: 2191 dmi.product.version: Lenovo IdeaPad Yoga 13 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.10+13.10.20130828.2-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.46-1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu3 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.14-4ubuntu3 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1 xserver.bootTime: Wed Sep 18 09:47:52 2013 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 864 vendor LGD xserver.version: 2:1.14.2.901-2ubuntu4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1227188/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
