Arne Henningsen, could you please test the latest mainline kernel via http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17-rc3-utopic/ and advise to the results?
** Attachment removed: "ProcEnviron.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1349002/+attachment/4163536/+files/ProcEnviron.txt ** Tags added: regression-release ** 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/1349002 Title: Screen brightness cannot be changed on HP EliteBook 8560w Status in “linux” package in Ubuntu: Incomplete Bug description: I cannot change the screen brightness on my HP Elitebook 8560w. If I use the keys for changing the screen brightness (fn + f9 or fn + f10), the on-screen display appears and the displayed percentage changes as intended but the actual screen brightness does not change (i.e. it remains at full brightness). Similarly, if I do not use my computer for some time, the on-screen display appears and indicates the the screen brightness is reduced (lower percentage) but the actual screen brightness remains unchanged (at full brightness). I have this computer since November 2011 and I had always the latest Kubuntu version installed. Changing the screen brightness always worked until and including Kubuntu 13.10. However, it stopped working when I upgraded to Kubuntu 14.04. I have upgraded my computer's BIOS to the latest version (F.42) but this did not help. As I also experience another bug (1337579) with Kubuntu 14.04, I have upgraded the kernel to the upstream kernel (3.14.4-031404) and a mainline kernel (3.16.0-031600rc6) but the bug occurs with all three kernel versions. --- ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ubuntu 3663 F.... pulseaudio /dev/snd/controlC0: ubuntu 3663 F.... pulseaudio CasperVersion: 1.340 CurrentDesktop: Unity DistroRelease: Ubuntu 14.04 LiveMediaBuild: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Hewlett-Packard HP EliteBook 8560w Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 nouveaufb ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4 RelatedPackageVersions: linux-restricted-modules-3.13.0-32-generic N/A linux-backports-modules-3.13.0-32-generic N/A linux-firmware 1.127.5 Tags: trusty Uname: Linux 3.13.0-32-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 07/15/2013 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68SVD Ver. F.42 dmi.board.name: 1631 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 01.3D dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68SVDVer.F.42:bd07/15/2013:svnHewlett-Packard:pnHPEliteBook8560w:pvrA0001D02:rvnHewlett-Packard:rn1631:rvrKBCVersion01.3D:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP EliteBook 8560w dmi.product.version: A0001D02 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1349002/+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
