Did this issue occur in a previous version of Ubuntu, or is this a new issue?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.12 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc2-trusty/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1258058 Title: Brightness control no effect on screen Status in “linux” package in Ubuntu: Incomplete Bug description: Brightness control no effect on screen, I managed to get control over brightness by using xbacklight. My issue (laptop and everything else) is exactly the same as this one http://ubuntuforums.org/showthread.php?t=2167180 ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-14-generic 3.11.0-14.21 ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7 Uname: Linux 3.11.0-14-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: radenkovich 2284 F.... pulseaudio /dev/snd/controlC0: radenkovich 2284 F.... pulseaudio Date: Thu Dec 5 09:45:30 2013 HibernationDevice: RESUME=UUID=ea9a6ac1-13ea-4060-9ef9-60a3309bd921 InstallationDate: Installed on 2013-11-11 (23 days ago) InstallationMedia: This MachineType: LENOVO 20217 MarkForUpload: True ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed root=UUID=aec56d0c-f753-4e40-948a-34e69d7dfca6 ro "acpi_osi=!Windows 2012" RelatedPackageVersions: linux-restricted-modules-3.11.0-14-generic N/A linux-backports-modules-3.11.0-14-generic N/A linux-firmware 1.116 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/22/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 74CN41WW(V2.07) dmi.board.asset.tag: No Asset Tag dmi.board.name: VIQY0Y1 dmi.board.vendor: LENOVO dmi.board.version: 31900004STD dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo IdeaPad Y510P dmi.modalias: dmi:bvnLENOVO:bvr74CN41WW(V2.07):bd08/22/2013:svnLENOVO:pn20217:pvrLenovoIdeaPadY510P:rvnLENOVO:rnVIQY0Y1:rvr31900004STD:cvnLENOVO:ct10:cvrLenovoIdeaPadY510P: dmi.product.name: 20217 dmi.product.version: Lenovo IdeaPad Y510P dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258058/+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
