As dmachine writes in arch forum (bbs.archlinux.org/viewtopic.php?id=203602) adding acpi_backlight=video in the grub parameters solves the problem.
-- 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/1537979 Title: Lenovo Z500 Status in linux package in Ubuntu: Invalid Bug description: The Brightness keys not supported. Using Nvidia and Intel graphic cards. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-23-generic 4.2.0-23.28 ProcVersionSignature: Ubuntu 4.2.0-23.28-generic 4.2.6 Uname: Linux 4.2.0-23-generic x86_64 ApportVersion: 2.19.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: pensivegroot 1464 F.... pulseaudio CurrentDesktop: Unity Date: Tue Jan 26 09:59:08 2016 HibernationDevice: RESUME=UUID=24719b74-64d3-4398-a12d-1c3a9af21cec InstallationDate: Installed on 2016-01-17 (8 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: LENOVO 20202 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-23-generic.efi.signed root=UUID=9c7c5a6c-ebc4-4429-8c14-efe9e464a1f8 ro quiet RelatedPackageVersions: linux-restricted-modules-4.2.0-23-generic N/A linux-backports-modules-4.2.0-23-generic N/A linux-firmware 1.149 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/10/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 71CN45WW(V1.18) dmi.board.asset.tag: No Asset Tag dmi.board.name: INVALID dmi.board.vendor: LENOVO dmi.board.version: 31900004WIN8 STD SGL dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo IdeaPad Z500 dmi.modalias: dmi:bvnLENOVO:bvr71CN45WW(V1.18):bd05/10/2013:svnLENOVO:pn20202:pvrLenovoIdeaPadZ500:rvnLENOVO:rnINVALID:rvr31900004WIN8STDSGL:cvnLENOVO:ct10:cvrLenovoIdeaPadZ500: dmi.product.name: 20202 dmi.product.version: Lenovo IdeaPad Z500 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1537979/+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
