Jérôme Poulin, could you please test the latest upstream kernel available from the very top line at the top of the page (the release names are irrelevant for testing, and please do not test the daily folder) following https://wiki.ubuntu.com/Kernel/MainlineBuilds ? It will allow additional upstream developers to examine the issue.
If the test did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description: kernel-fixed-upstream kernel-fixed-upstream-X.Y-rcZ Where X, Y, and Z are numbers corresponding to the kernel version. If the mainline kernel does not fix this bug, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-X.Y-rcZ Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream. Once testing of the latest upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Tags added: latest-bios-208 ** Attachment removed: "version" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1421834/+attachment/4319001/+files/version ** Description changed: Backlight keys are not working when logged in the desktop, using /sys/class/backlight/intel_backlight/brightness can adjust the brightness. Usual workarounds listed in https://wiki.ubuntu.com/Kernel/Debugging/Backlight are not working. + + WORKAROUND: Add to GRUB: + acpi_osi= ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.16.0-30-generic 3.16.0-30.40~14.04.1 ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3 Uname: Linux 3.16.0-30-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 CurrentDesktop: Unity Date: Fri Feb 13 15:46:37 2015 SourcePackage: linux-lts-utopic UpgradeStatus: Upgraded to trusty on 2014-03-25 (325 days ago) - --- + --- ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: jerome.poulin 3195 F.... pulseaudio - /dev/snd/controlC1: jerome.poulin 3195 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: jerome.poulin 3195 F.... pulseaudio + /dev/snd/controlC1: jerome.poulin 3195 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.04 MachineType: ASUSTeK COMPUTER INC. N550JK Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: root=/dev/vgUbuntu/root initrd=EFI/ubuntuefi/initrd splash quiet resume=/dev/mapper/vgUbuntu-swap acpi_osi= ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1 RelatedPackageVersions: - linux-restricted-modules-3.19.0-22-generic N/A - linux-backports-modules-3.19.0-22-generic N/A - linux-firmware 1.143.2 + linux-restricted-modules-3.19.0-22-generic N/A + linux-backports-modules-3.19.0-22-generic N/A + linux-firmware 1.143.2 Tags: vivid Uname: Linux 3.19.0-22-generic x86_64 UpgradeStatus: Upgraded to vivid on 2015-06-12 (44 days ago) UserGroups: adm dialout docker fuse kismet libvirtd lp messagebus mlocate plugdev pulse-access src sudo users vboxusers video wireshark _MarkForUpload: True dmi.bios.date: 09/26/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N550JK.208 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N550JK dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN550JK.208:bd09/26/2014:svnASUSTeKCOMPUTERINC.:pnN550JK:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN550JK:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: N550JK dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. ** Changed in: linux (Ubuntu) Importance: Low => Medium ** Changed in: linux (Ubuntu) Status: Expired => 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/1421834 Title: Backlight keys not working on ASUS N550JK Status in linux package in Ubuntu: Incomplete Bug description: Backlight keys are not working when logged in the desktop, using /sys/class/backlight/intel_backlight/brightness can adjust the brightness. Usual workarounds listed in https://wiki.ubuntu.com/Kernel/Debugging/Backlight are not working. WORKAROUND: Add to GRUB: acpi_osi= ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.16.0-30-generic 3.16.0-30.40~14.04.1 ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3 Uname: Linux 3.16.0-30-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 CurrentDesktop: Unity Date: Fri Feb 13 15:46:37 2015 SourcePackage: linux-lts-utopic UpgradeStatus: Upgraded to trusty on 2014-03-25 (325 days ago) --- ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jerome.poulin 3195 F.... pulseaudio /dev/snd/controlC1: jerome.poulin 3195 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.04 MachineType: ASUSTeK COMPUTER INC. N550JK Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: root=/dev/vgUbuntu/root initrd=EFI/ubuntuefi/initrd splash quiet resume=/dev/mapper/vgUbuntu-swap acpi_osi= ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1 RelatedPackageVersions: linux-restricted-modules-3.19.0-22-generic N/A linux-backports-modules-3.19.0-22-generic N/A linux-firmware 1.143.2 Tags: vivid Uname: Linux 3.19.0-22-generic x86_64 UpgradeStatus: Upgraded to vivid on 2015-06-12 (44 days ago) UserGroups: adm dialout docker fuse kismet libvirtd lp messagebus mlocate plugdev pulse-access src sudo users vboxusers video wireshark _MarkForUpload: True dmi.bios.date: 09/26/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N550JK.208 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N550JK dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN550JK.208:bd09/26/2014:svnASUSTeKCOMPUTERINC.:pnN550JK:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN550JK:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: N550JK dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. 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