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[Edward Lin <yidi.lin@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu Trusty)
       Status: In Progress => Triaged

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https://bugs.launchpad.net/bugs/1250401

Title:
  [Dell Inspiron 5737] brightness could not be controlled by the
  indicator applet "System settings -> Brightness and Lock"" but sysfs
  works

Status in “linux” package in Ubuntu:
  Confirmed
Status in “linux-lts-raring” package in Ubuntu:
  New
Status in “linux” source package in Trusty:
  Triaged
Status in “linux-lts-raring” source package in Trusty:
  Invalid

Bug description:
  Dell Inspiron 5737 (CID 201305-13636) with ubuntu 12.04.3

  steps to reproduce the bug:
  1. install 12.04.3 on this machine
  2. update the system via update manager to make the system up-to-date
  3. click the upper-right indicator to launch the "System settings -> Brightness and Lock" applet
  4. try to adjust the brightness bar to control the brightness

  expected result:
  the brightness could be adjusted by the bar

  actual result:
  screen brightness has no response

  --------------------------------------

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.8.0-33-generic 3.8.0-33.48~precise1
  ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11
  Uname: Linux 3.8.0-33-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-33-generic.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 1: PCH [HDA Intel PCH], device 0: ALC283 Analog [ALC283 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     1708 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     1708 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'MID'/'HDA Intel MID at 0x90710000 irq 62'
     Mixer name	: 'Intel Haswell HDMI'
     Components	: 'HDA:80862807,80860101,00100000'
     Controls      : 21
     Simple ctrls  : 3
  Card1.Amixer.info:
   Card hw:1 'PCH'/'HDA Intel PCH at 0x90714000 irq 63'
     Mixer name	: 'Realtek ALC283'
     Components	: 'HDA:10ec0283,102805ec,00100002'
     Controls      : 16
     Simple ctrls  : 7
  Date: Tue Nov 12 05:49:09 2013
  HibernationDevice: RESUME=UUID=d809501f-7daa-47a2-8299-1844cd4d75cc
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
  MachineType: Dell Inc. Inspiron 5737
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-33-generic root=UUID=fdac94e0-b7ee-402a-a160-6567b65501c6 ro quiet splash initcall_debug vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-33-generic N/A
   linux-backports-modules-3.8.0-33-generic  N/A
   linux-firmware                            1.79.7
  SourcePackage: linux-lts-raring
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/30/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 04X8RP
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X01
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A05
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd08/30/2013:svnDellInc.:pnInspiron5737:pvrA05:rvnDellInc.:rn04X8RP:rvrX01:cvnDellInc.:ct8:cvrA05:
  dmi.product.name: Inspiron 5737
  dmi.product.version: A05
  dmi.sys.vendor: Dell Inc.

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