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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1517467

Title:
  Function brightness keys do not change brightness.

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is occurring on a Lenovo y510p machine running Ubuntu 15.10. My
  machine has a double Nvidia GT750M setup, running the latest Nvidia
  tested drivers (352.41)

   I have read that installing the nvidiabl driver might help but I
  wasn't able to succeed installing
  https://github.com/guillaumezin/nvidiabl in my system.

  I have attempted editing GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub to "quiet splash acpi_osi=Linux
  acpi_backlight=vendor" with no success.

  I have also attempted adding Option "RegistryDwords"
  "EnableBrightnessControl=1" to my nvidia xorg config file with no
  success.

  I managed a workaround solution by mapping keyboard shortcuts to the
  commands xbacklight -inc 5 and xbacklight -dec 5.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-18-generic 4.2.0-18.22
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  hao        1642 F.... pulseaudio
   /dev/snd/controlC0:  hao        1642 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Nov 18 04:51:45 2015
  HibernationDevice: RESUME=UUID=6dfe08a3-bcd0-426c-b311-9bbf0e166496
  InstallationDate: Installed on 2015-10-31 (18 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: LENOVO 20217
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic.efi.signed root=UUID=609b882f-3a8a-4853-b2a1-6c518137b96f ro quiet splash acpi_osi=Linux acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-18-generic N/A
   linux-backports-modules-4.2.0-18-generic  N/A
   linux-firmware                            1.149.2
  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: 07/18/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 74CN35WW(V1.10)
  dmi.board.asset.tag: YB00949273
  dmi.board.name: 20217
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900003Std
  dmi.chassis.asset.tag: YB00949273
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo IdeaPad Y510P
  dmi.modalias: dmi:bvnLENOVO:bvr74CN35WW(V1.10):bd07/18/2013:svnLENOVO:pn20217:pvrLenovoIdeaPadY510P:rvnLENOVO:rn20217:rvr31900003Std:cvnLENOVO:ct10:cvrLenovoIdeaPadY510P:
  dmi.product.name: 20217
  dmi.product.version: Lenovo IdeaPad Y510P
  dmi.sys.vendor: LENOVO

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