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[Bug 1083984] Re: Brightness control doesn't work on Lenovo Thinkpad T530

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: "Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>
Date: Tue, 19 Nov 2013 12:26:06 -0000
Reply-to: Bug 1083984 <1083984@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Matt White, as per http://download.lenovo.com/express/ddfm.html an
update is available for your BIOS (2.53). If you update to this
following https://help.ubuntu.com/community/BiosUpdate , does it change
anything?

If not, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful.

For more on BIOS updates and linux, please see
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
.

Thank you for your understanding.

** Description changed:

- Following instructions on
- https://wiki.kubuntu.org/Kernel/Debugging/Backlight
- 
- I have tried in /etc/default/grub: kernel parameters
+ This laptop has Optimus. Following instructions on https://wiki.kubuntu.org/Kernel/Debugging/Backlight I have tried in /etc/default/grub kernel parameters:
  acpi_backlight=vendor, thinkpad-acpi.brightness_enable=1.
  
  I have tried /usr/share/X11/xorg.conf.d/10-brightness-control.conf:
  Option "RegistryDwords" "EnableBrightnessControl=1"
  
  I have tried editing /sys/class/backlight/acpi_video0/brightness with
  tee
  
- None of these have enabled brightness control. If I boot with integrated
- graphics instead of Nvidia, it works fine. (Note: this laptop has
- Optimus). Any further suggestions?
+ None of these have enabled brightness control.
+ 
+ WORKAROUND: If I boot with integrated graphics instead of Nvidia, it
+ works fine.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-18-generic 3.5.0-18.29
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic x86_64
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC1:  mwhite     2138 F.... pulseaudio
-  /dev/snd/controlC0:  mwhite     2138 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC1:  mwhite     2138 F.... pulseaudio
+  /dev/snd/controlC0:  mwhite     2138 F.... pulseaudio
  Date: Tue Nov 27 23:39:07 2012
  HibernationDevice: RESUME=UUID=c574cd15-a9b9-4064-b22e-62b5bf4ce531
  InstallationDate: Installed on 2012-11-27 (0 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: LENOVO 2359CTO
  MarkForUpload: True
  ProcEnviron:
-  TERM=xterm
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic.efi.signed root=UUID=fdfd5708-06eb-454a-a3c7-bdd98054c811 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-3.5.0-18-generic N/A
-  linux-backports-modules-3.5.0-18-generic  N/A
-  linux-firmware                            1.95
+  linux-restricted-modules-3.5.0-18-generic N/A
+  linux-backports-modules-3.5.0-18-generic  N/A
+  linux-firmware                            1.95
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/13/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G4ET62WW (2.04 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2359CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 Pro DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2359CTO
  dmi.product.version: ThinkPad T530
  dmi.sys.vendor: LENOVO

** Summary changed:

- Brightness control doesn't work on Lenovo Thinkpad T530
+ 10de:0def [Lenovo Thinkpad T530] With discrete graphics brightness control doesn't work

** Tags added: bios-outdated-2.56

** Changed in: linux (Ubuntu)
   Importance: Medium => Low

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

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https://bugs.launchpad.net/bugs/1083984

Title:
  10de:0def [Lenovo Thinkpad T530] With discrete graphics brightness
  control doesn't work

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  This laptop has Optimus. Following instructions on https://wiki.kubuntu.org/Kernel/Debugging/Backlight I have tried in /etc/default/grub kernel parameters:
  acpi_backlight=vendor, thinkpad-acpi.brightness_enable=1.

  I have tried /usr/share/X11/xorg.conf.d/10-brightness-control.conf:
  Option "RegistryDwords" "EnableBrightnessControl=1"

  I have tried editing /sys/class/backlight/acpi_video0/brightness with
  tee

  None of these have enabled brightness control.

  WORKAROUND: If I boot with integrated graphics instead of Nvidia, it
  works fine.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-18-generic 3.5.0-18.29
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic x86_64
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  mwhite     2138 F.... pulseaudio
   /dev/snd/controlC0:  mwhite     2138 F.... pulseaudio
  Date: Tue Nov 27 23:39:07 2012
  HibernationDevice: RESUME=UUID=c574cd15-a9b9-4064-b22e-62b5bf4ce531
  InstallationDate: Installed on 2012-11-27 (0 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: LENOVO 2359CTO
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic.efi.signed root=UUID=fdfd5708-06eb-454a-a3c7-bdd98054c811 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-18-generic N/A
   linux-backports-modules-3.5.0-18-generic  N/A
   linux-firmware                            1.95
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/13/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G4ET62WW (2.04 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2359CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 Pro DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2359CTO
  dmi.product.version: ThinkPad T530
  dmi.sys.vendor: LENOVO

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