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[Bug 1304644] [NEW] [Dell Inspiron 15R 5521] Impossible to adjust the screen backlight

 

Public bug reported:

the change in the level of illumination of the screen, through the
corresponding option in the control panel, has no effect.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-23-generic 3.13.0-23.45
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  alex       2122 F.... pulseaudio
 /dev/snd/pcmC0D0p:   alex       2122 F...m pulseaudio
CurrentDesktop: Unity
Date: Tue Apr  8 22:14:22 2014
HibernationDevice: RESUME=UUID=f298bdcb-dec7-4870-a147-d0899d622706
InstallationDate: Installed on 2014-04-02 (5 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
MachineType: Dell Inc. Inspiron 5521
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-23-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-23-generic N/A
 linux-backports-modules-3.13.0-23-generic  N/A
 linux-firmware                             1.127
SourcePackage: linux
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/25/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0K08H3
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A12
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd10/25/2013:svnDellInc.:pnInspiron5521:pvrA12:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA12:
dmi.product.name: Inspiron 5521
dmi.product.version: A12
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug staging trusty

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https://bugs.launchpad.net/bugs/1304644

Title:
  [Dell Inspiron 15R 5521] Impossible to adjust the screen backlight

Status in “linux” package in Ubuntu:
  New

Bug description:
  the change in the level of illumination of the screen, through the
  corresponding option in the control panel, has no effect.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-23-generic 3.13.0-23.45
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  Uname: Linux 3.13.0-23-generic x86_64
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alex       2122 F.... pulseaudio
   /dev/snd/pcmC0D0p:   alex       2122 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Tue Apr  8 22:14:22 2014
  HibernationDevice: RESUME=UUID=f298bdcb-dec7-4870-a147-d0899d622706
  InstallationDate: Installed on 2014-04-02 (5 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  MachineType: Dell Inc. Inspiron 5521
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-23-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-23-generic N/A
   linux-backports-modules-3.13.0-23-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A12
  dmi.board.name: 0K08H3
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A12
  dmi.modalias: dmi:bvnDellInc.:bvrA12:bd10/25/2013:svnDellInc.:pnInspiron5521:pvrA12:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA12:
  dmi.product.name: Inspiron 5521
  dmi.product.version: A12
  dmi.sys.vendor: Dell Inc.

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