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

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https://bugs.launchpad.net/bugs/1613106

Title:
  Sony VAIO PCG-61A12L (VPCEG16FM) Intel Backlight Issue

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  The backlight for this model cannot be modified by the backlight keys
  unless a GRUB configuration is built with acpi_backlight=none set in
  /etc/default/grub.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-34-generic 4.4.0-34.53
  ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
  Uname: Linux 4.4.0-34-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   mmstick    3054 F...m pulseaudio
   /dev/snd/controlC0:  mmstick    3054 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sun Aug 14 15:43:13 2016
  HibernationDevice: RESUME=UUID=43c727dc-4258-4b8f-b38d-ac0aaa416526
  InstallationDate: Installed on 2016-08-14 (0 days ago)
  InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160720)
  MachineType: Sony Corporation VPCEG16FM
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-34-generic 
root=UUID=4001663d-ba36-4c89-a89a-bb248d1d261c ro rootflags=subvol=@ quiet 
splash acpi_osi=Linux acpi_backlight=none video.use_native_backlight=1 
vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-34-generic N/A
   linux-backports-modules-4.4.0-34-generic  N/A
   linux-firmware                            1.157.3
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/02/2011
  dmi.bios.vendor: INSYDE
  dmi.bios.version: R0210Z8
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnINSYDE:bvrR0210Z8:bd05/02/2011:svnSonyCorporation:pnVPCEG16FM:pvrC900R1KJ:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VPCEG16FM
  dmi.product.version: C900R1KJ
  dmi.sys.vendor: Sony Corporation

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