** Changed in: linux (Ubuntu Vivid)
       Status: In Progress => Won't Fix

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https://bugs.launchpad.net/bugs/1646537

Title:
  Backlight sometimes fails to resume from suspend & screen brightness
  sometimes will not dim below 100%

Status in linux package in Ubuntu:
  Fix Released
Status in xorg package in Ubuntu:
  Invalid
Status in linux source package in Vivid:
  Won't Fix
Status in xorg source package in Vivid:
  Invalid
Status in linux source package in Xenial:
  Fix Released
Status in xorg source package in Xenial:
  Invalid

Bug description:
  Back-light sometimes fails to resume from suspend & screen brightness
  sometimes will not dim below 100%

  Issue is interment in occurrence. Will be reproducible with the
  command "sudo pm-suspend" & or close/reopen laptop lid for a period of
  time days or hours, then go a period of time, days or hours without
  being able to trigger it again.

  This is irrespective of running "apt-get update && apt-get upgrade -y"
  and has continued to be intermittent on last 3 versions of 3.19
  kernel.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8.1
  ProcVersionSignature: Ubuntu 3.19.0-74.82~14.04.1-generic 3.19.8-ckt22
  Uname: Linux 3.19.0-74-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Thu Dec  1 10:06:43 2016
  DistUpgraded: Fresh install
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see 
http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-trusty-amd64-osp1-20150721-1
  DistroCodename: trusty
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Device [8086:191b] (rev 06) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:06e5]
  InstallationDate: Installed on 2016-11-22 (8 days ago)
  InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 
20150721-23:28
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 04f3:21d4 Elan Microelectronics Corp. 
   Bus 001 Device 002: ID 8087:0a2b Intel Corp. 
   Bus 001 Device 004: ID 1bcf:2b95 Sunplus Innovation Technology Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. Precision 5510
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-74-generic.efi.signed 
root=UUID=8eaa6744-6718-456a-bda0-762475144d35 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/31/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.2.14
  dmi.board.name: 0W7V82
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.2.14:bd08/31/2016:svnDellInc.:pnPrecision5510:pvr:rvnDellInc.:rn0W7V82:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Precision 5510
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.11.3+14.04.20160425-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.67-1ubuntu0.14.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri N/A
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core N/A
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
  xserver.bootTime: Thu Dec  1 09:14:43 2016
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                5182 
   vendor                                     SHP
  xserver.version: 2:1.17.1-0ubuntu3.1~trusty1.1

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