ubuntu-x-swat team mailing list archive

[Tom Gelinas <tom.gelinas@xxxxxxxxx>]

Delyan, are you able to force the NVIDIA proprietary driver to control
the backlight? You can do this by adding


Option "RegistryDwords" "EnableBrightnessControl=1

to the "Devices" section of xorg.conf and then restarting. Also, does
your backlight emit a buzz or humming noise when the brightness has been
changed using the NVIDIA drivers?

** Summary changed:

- Backlight controls on ThinkPad T510 and W510 no longer function when using proprietary drivers
+ Backlight controls of laptops with NVIDIA NVS 3100M no longer function while using proprietary drivers

** Tags added: 3100m nvs

** Summary changed:

- Backlight controls of laptops with NVIDIA NVS 3100M no longer function while using proprietary drivers
+ Backlight controls of laptops with NVIDIA NVS and Quadro FX 880M GPUs no longer function while using proprietary drivers

** Tags added: 880m fx quadro

** Description changed:

- The brightness controls on ThinkPad T510s and W510s work  while running
- Nouveau or when using a text mode VT, but not while running X and using
- proprietary NVIDIA drivers.  It is possible to force the nvidia driver
- to control the backlight by adding [Option "RegistryDwords"
- "EnableBrightnessControl=1"] to the "Devices" section of xorg.conf .
- While this allows the backlight to be controlled, the increments are
- inconsistent and often result in a buzzing noise from the LED backlight.
- Since this did not occur while running nouveau or when switching in text
- VT, something is wrong.
+ The brightness controls of laptops with NVIDIA NVS 3100M or Quadro FX
+ 880M GPUs work  while running Nouveau or when using a text mode VT, but
+ not while running X and using proprietary NVIDIA drivers.  It is
+ possible to force the NVIDIA driver to control the backlight by adding
+ [Option "RegistryDwords" "EnableBrightnessControl=1"] to the "Devices"
+ section of xorg.conf . While this allows the backlight to be controlled,
+ the increments are inconsistent and often result in a buzzing noise from
+ the LED backlight on Lenovo ThinkPad T510s and W510s. Since this did not
+ occur while running nouveau or when switching in text VT, something is
+ wrong.
  
  This bad backlight behaviour has been confirmed on ThinkPad models T510 and W510 with NVIDIA NVS 3100m and Quadro FX 880M chipsets, respectively, via http://www.thinkwiki.org/wiki/Category:T510
  The issue is discussed on the nvnews.net forums at http://www.nvnews.net/vbulletin/showthread.php?t=145105 and http://www.nvnews.net/vbulletin/showthread.php?t=150069 . An NVIDIA developer has said he will investigate the issue.
- 
  
  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: nvidia-current 195.36.15-0ubuntu2
  ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
  Uname: Linux 2.6.32-19-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Mon Apr 12 23:48:02 2010
  DkmsStatus:
-  tp-smapi, 0.40, 2.6.32-19-generic, x86_64: installed 
-  vboxnetadp, 3.1.6, 2.6.32-19-generic, x86_64: installed 
-  vboxnetflt, 3.1.6, 2.6.32-19-generic, x86_64: installed 
-  vboxdrv, 3.1.6, 2.6.32-19-generic, x86_64: installed 
-  nvidia-current, 195.36.15, 2.6.32-19-generic, x86_64: installed
+  tp-smapi, 0.40, 2.6.32-19-generic, x86_64: installed
+  vboxnetadp, 3.1.6, 2.6.32-19-generic, x86_64: installed
+  vboxnetflt, 3.1.6, 2.6.32-19-generic, x86_64: installed
+  vboxdrv, 3.1.6, 2.6.32-19-generic, x86_64: installed
+  nvidia-current, 195.36.15, 2.6.32-19-generic, x86_64: installed
  EcryptfsInUse: Yes
  GdmLog1:
-  
+ 
  Lsusb:
-  Bus 002 Device 002: ID 8087:0020  
-  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
-  Bus 001 Device 003: ID 17ef:480f Lenovo 
-  Bus 001 Device 002: ID 8087:0020  
-  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+  Bus 002 Device 002: ID 8087:0020
+  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+  Bus 001 Device 003: ID 17ef:480f Lenovo
+  Bus 001 Device 002: ID 8087:0020
+  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 4313CTO
  ProcCmdLine: BOOT_IMAGE=/bhostnamet/vmlinuz-2.6.32-19-generic rhostnamet=UUID=0b95b314-337f-49aa-86f9-6423e76e9f20 ro
  ProcEnviron:
-  LANG=en_CA.utf8
-  SHELL=/bin/bash
+  LANG=en_CA.utf8
+  SHELL=/bin/bash
  SourcePackage: nvidia-graphics-drivers
  XorgLogOld:
-  
+ 
  dmi.bios.date: 02/22/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6MET49WW (1.12 )
  dmi.board.name: 4313CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6MET49WW(1.12):bd02/22/2010:svnLENOVO:pn4313CTO:pvrThinkPadT510:rvnLENOVO:rn4313CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4313CTO
  dmi.product.version: ThinkPad T510
  dmi.sys.vendor: LENOVO
  system:
-  distro:             Ubuntu
-  codename:           lucid
-  architecture:       x86_64
-  kernel:             2.6.32-19-generic
+  distro:             Ubuntu
+  codename:           lucid
+  architecture:       x86_64
+  kernel:             2.6.32-19-generic

-- 
Backlight controls of laptops with NVIDIA NVS and Quadro FX 880M GPUs no longer function while using proprietary drivers
https://bugs.launchpad.net/bugs/562005
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