Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.13 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/v3.14-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/1280394 Title: 8086:0116 [Dell Inspiron 14z (N411z)] Display brightness keys do not work on kernels 3.11 and 3.13 Status in “linux” package in Ubuntu: Incomplete Bug description: Brightness keys Fn+F4 and Fn+F5 (decrease and increase brightness) do not work on 13.10 and 14.04. On 12.04 (up to 12.04.3) and 13.04 worked ok. That is, up to ubuntu repository kernel 3.8 the brightness keys worked ok. On ubuntu repository kernels 3.11 and 3.13, the brightness keys do not work. (this includes 12.04.4 that has kernel 3.11). I currently have installed 14.04 with kernel 3.13.0-8. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-8-generic 3.13.0-8.28 ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2 Uname: Linux 3.13.0-8-generic x86_64 ApportVersion: 2.13.2-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mike 1549 F.... pulseaudio CurrentDesktop: Unity Date: Fri Feb 14 20:01:28 2014 HibernationDevice: RESUME=UUID=4ffb442c-e2bf-4dbd-8a25-6a4ef0e346f2 InstallationDate: Installed on 2014-01-25 (19 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140124) MachineType: Dell Inc. Dell System Inspiron N411Z ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-8-generic root=UUID=308a58c8-4425-4ae1-b9a5-86bee1de5030 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-8-generic N/A linux-backports-modules-3.13.0-8-generic N/A linux-firmware 1.124 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: dmi.bios.date: 09/10/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A06 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 0YWNPW dmi.board.vendor: Dell Inc. dmi.board.version: FAB1 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA06:bd09/10/2012:svnDellInc.:pnDellSystemInspironN411Z:pvr:rvnDellInc.:rn0YWNPW:rvrFAB1:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System Inspiron N411Z dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1280394/+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