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[Bug 973321] Re: [Samsung NP300V5Z-S01EE] Backlight/Brightness controls


Pekorius Nedas, because Samsung does not easily reveal what the latest BIOS is for this model, could you please download the latest firmware software as per http://www.samsung.com/lv/support/model/NP300V5Z-S01EE-downloads, and advise if a BIOS update is available? If so, when you update to this, 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

Thank you for your understanding.

** Summary changed:

- Samsung 300V5Z Backlight/Brightness controls
+ [Samsung NP300V5Z-S01EE] Backlight/Brightness controls

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  [Samsung NP300V5Z-S01EE] Backlight/Brightness controls

Status in “linux” package in Ubuntu:

Bug description:
  Unable to change screen backlight level

   Brightness function keys work only from 100% to around 85% and back
  to 100%, looks like it only moves one step down. but brightness can be
  modified directly on display settings, so the bug is only on the
  function keys.

  Samsung 300V5Z-S01EE Backlight

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-21-generic 3.2.0-22.35
  ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
  Uname: Linux 3.2.0-21-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0-0ubuntu4
  Architecture: amd64
   /dev/snd/controlC0:  nedas      1516 F.... pulseaudio
  Date: Wed Apr  4 14:55:53 2012
  HibernationDevice: RESUME=UUID=bd74e065-5009-42e7-b53b-668df0b2b90b
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120404)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 300V3Z/300V4Z/300V5Z/200A4Y/200A5Y
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-21-generic root=UUID=59772c8b-4134-4b2a-8c82-19f1fae7b446 ro quiet splash acpi_backlight=vendor vt.handoff=7
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/12/2011
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 02FU
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 300V3Z/300V4Z/300V5Z/200A4Y/200A5Y
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr02FU:bd10/12/2011:svnSAMSUNGELECTRONICSCO.,LTD.:pn300V3Z/300V4Z/300V5Z/200A4Y/200A5Y:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn300V3Z/300V4Z/300V5Z/200A4Y/200A5Y:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 300V3Z/300V4Z/300V5Z/200A4Y/200A5Y
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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