This change was made by a bot.

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

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https://bugs.launchpad.net/bugs/1786048

Title:
  display brightness not working

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Using intel dual_core processor i just upgrade lts-16.04 to ubuntu
  18.04 now i unable to reduce or increase brightness

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: linux-image-4.17.0-6-generic 4.17.0-6.7
  ProcVersionSignature: Ubuntu 4.17.0-6.7-generic 4.17.9
  Uname: Linux 4.17.0-6-generic i686
  ApportVersion: 2.20.10-0ubuntu7
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  rahul      1460 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Aug  8 19:43:11 2018
  HibernationDevice: RESUME=UUID=88199ab0-6838-4b90-a76c-b652cdaa92e7
  InstallationDate: Installed on 2018-08-03 (4 days ago)
  InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release i386 (20170801)
  MachineType: LENOVO INVALID
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.17.0-6-generic 
root=UUID=f569a9d4-9d61-428a-9277-bcfd42fe2e8c ro quiet splash 
acpi_backlight=video vt.handoff=1
  RelatedPackageVersions:
   linux-restricted-modules-4.17.0-6-generic N/A
   linux-backports-modules-4.17.0-6-generic  N/A
   linux-firmware                            1.174
  RfKill:
   0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to cosmic on 2018-08-07 (0 days ago)
  dmi.bios.date: 12/26/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 4FCNA1WW
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Base Board Product Name
  dmi.board.vendor: LENOVO
  dmi.board.version: Base Board Version
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnLENOVO:bvr4FCNA1WW:bd12/26/2011:svnLENOVO:pnINVALID:pvrLenovoB460e:rvnLENOVO:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
  dmi.product.family: Intel_Mobile
  dmi.product.name: INVALID
  dmi.product.version: Lenovo B460e
  dmi.sys.vendor: LENOVO

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