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[Bug 1261853] Re: 8086:0166 [Dell Inspiron 15R 5521] Impossible to adjust the screen backlight

 

Alex Barattini, thank you for performing the requested tests. Hence,
this is an upstream bug. Could you please report this through the
appropriate channel (would start with linux-acpi) by following the
instructions _verbatim_ via
https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Overview_on_Reporting_Bugs_Upstream
?

Thank you for your understanding.

** Description changed:

  the change in the level of illumination of the screen, through the
- corresponding option in the control panel, has no effect
+ corresponding option in the control panel, has no effect.
+ 
+ WORKAROUND: acpi_backlight=vendor
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-14-generic 3.11.0-14.21
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  alex       1443 F.... pulseaudio
-                       alex      11159 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  alex       1443 F.... pulseaudio
+                       alex      11159 F.... pulseaudio
  Date: Tue Dec 17 18:50:13 2013
  HibernationDevice: RESUME=UUID=04335018-6e1d-453d-a8ba-25ae1c34f2eb
  InstallationDate: Installed on 2013-12-14 (2 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. Inspiron 5521
  MarkForUpload: True
  ProcEnviron:
-  LANGUAGE=it
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=it_IT.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=it
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=it_IT.UTF-8
+  SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed root=UUID=d4cdcfba-0a53-41d0-a9ce-0516d3fab0f0 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-3.11.0-14-generic N/A
-  linux-backports-modules-3.11.0-14-generic  N/A
-  linux-firmware                             1.116
+  linux-restricted-modules-3.11.0-14-generic N/A
+  linux-backports-modules-3.11.0-14-generic  N/A
+  linux-firmware                             1.116
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/22/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  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: A06
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd02/22/2013:svnDellInc.:pnInspiron5521:pvrA06:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA06:
  dmi.product.name: Inspiron 5521
  dmi.product.version: A06
  dmi.sys.vendor: Dell Inc.

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

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https://bugs.launchpad.net/bugs/1261853

Title:
  8086:0166 [Dell Inspiron 15R 5521] Impossible to adjust the screen
  backlight

Status in “linux” package in Ubuntu:
  Triaged

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

  WORKAROUND: acpi_backlight=vendor

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-14-generic 3.11.0-14.21
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alex       1443 F.... pulseaudio
                        alex      11159 F.... pulseaudio
  Date: Tue Dec 17 18:50:13 2013
  HibernationDevice: RESUME=UUID=04335018-6e1d-453d-a8ba-25ae1c34f2eb
  InstallationDate: Installed on 2013-12-14 (2 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. Inspiron 5521
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=it
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed root=UUID=d4cdcfba-0a53-41d0-a9ce-0516d3fab0f0 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-14-generic N/A
   linux-backports-modules-3.11.0-14-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/22/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  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: A06
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd02/22/2013:svnDellInc.:pnInspiron5521:pvrA06:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA06:
  dmi.product.name: Inspiron 5521
  dmi.product.version: A06
  dmi.sys.vendor: Dell Inc.

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