Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.18 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'. 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/v4.18-rc3 ** 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/1780013 Title: Keyboard Backlight not working Status in linux package in Ubuntu: Incomplete Bug description: Tryed to set up /etc/default/grub with GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" and created /usr/share/X11/xorg.conf.d/80-backlight.conf with: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "sna" Option "Backlight" "acpi_video0" BusID "PCI:0:2:0" EndSection Still not working! ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-24-generic 4.15.0-24.26 ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18 Uname: Linux 4.15.0-24-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: tprigas 1679 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Wed Jul 4 05:37:45 2018 InstallationDate: Installed on 2018-06-27 (7 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: TOSHIBA QOSMIO X770 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-24-generic root=UUID=3ce7f2da-4fdf-4100-b7d3-0a9be1c0d836 ro quiet splash acpi_backlight=vendor vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-24-generic N/A linux-backports-modules-4.15.0-24-generic N/A linux-firmware 1.173.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/30/2012 dmi.bios.vendor: TOSHIBA dmi.bios.version: 2.10 dmi.board.asset.tag: NULL dmi.board.name: PGRAA dmi.board.vendor: TOSHIBA dmi.board.version: 1.00 dmi.chassis.asset.tag: * dmi.chassis.type: 10 dmi.chassis.vendor: TOSHIBA dmi.chassis.version: N/A dmi.modalias: dmi:bvnTOSHIBA:bvr2.10:bd10/30/2012:svnTOSHIBA:pnQOSMIOX770:pvrPSBY5E-02Q00NEP:rvnTOSHIBA:rnPGRAA:rvr1.00:cvnTOSHIBA:ct10:cvrN/A: dmi.product.family: ABCDEFGHIJKLMNOPQRSTUVWXYZ dmi.product.name: QOSMIO X770 dmi.product.version: PSBY5E-02Q00NEP dmi.sys.vendor: TOSHIBA To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1780013/+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
