kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

bademux, thank you for reporting this and helping make Ubuntu better.
Just to advise, in the future please do not compress/tar attachments as
it makes it harder for developers and triagers to help you.

Despite this, could you please test the latest upstream kernel available
from the very top line at the top of the page (the release names are
irrelevant for testing, and please do not test the daily folder)
following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow
additional upstream developers to examine the issue.

If the test did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested exactly shown as:
kernel-fixed-upstream-3.18-rc7

This can be done by clicking on the yellow circle with a black pencil
icon next to the word Tags located at the bottom of the bug description.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

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

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

** Summary changed:

- Backlight doesn't work on Samsung np730U3E-S01PL
+ [Samsung NP730U3E-S01PL] LCD backlight doesn't work

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1399823

Title:
  [Samsung NP730U3E-S01PL] LCD backlight doesn't work

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Backlight, no LCD, neither keyboard, doesn't work.

  echo 1 > /sys/class/backlight/intel_backlight/brightness #nothig changes
  echo 0 > /sys/class/backlight/intel_backlight/brightness #turns off LCD backlight

  there is no /proc/sys/video/use_native_backlight

  acpi_backlight =... # no effect at all

  # grep . /sys/class/backlight/intel_backlight/*
  /sys/class/backlight/intel_backlight/actual_brightness:8
  /sys/class/backlight/intel_backlight/bl_power:0
  /sys/class/backlight/intel_backlight/brightness:8
  grep: /sys/class/backlight/intel_backlight/device: Jest katalogiem
  /sys/class/backlight/intel_backlight/max_brightness:4650
  grep: /sys/class/backlight/intel_backlight/power: Jest katalogiem
  grep: /sys/class/backlight/intel_backlight/subsystem: Jest katalogiem
  /sys/class/backlight/intel_backlight/type:raw

  # dmesg|grep 'ACPI: Video'
  [    1.766081] ACPI: Video Device [PEGP] (multi-head: yes  rom: no  post: no)
  [    1.767014] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no

  # lspci |grep VGA
  00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-25-generic 3.16.0-25.33
  ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
  Uname: Linux 3.16.0-25-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  kasia      2021 F.... pulseaudio
  Date: Sat Dec  6 00:16:19 2014
  HibernationDevice: RESUME=UUID=aa9f54d4-8ed7-4e2b-9107-8ffa2b36e88e
  InstallationDate: Installed on 2014-12-05 (0 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 730U3E/740U3E
  ProcEnviron:
   LANGUAGE=pl
   TERM=xterm
   PATH=(custom, no user)
   LANG=pl_PL.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-25-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash acpi_backlight=vendor vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-25-generic N/A
   linux-backports-modules-3.16.0-25-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/26/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P07ABW.065.140226.dg
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: NP730U3E-S01PL
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: SEC_SW_REVISION_1234567890ABCD
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP07ABW.065.140226.dg:bd02/26/2014:svnSAMSUNGELECTRONICSCO.,LTD.:pn730U3E/740U3E:pvrP07ABW:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP730U3E-S01PL:rvrSEC_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
  dmi.product.name: 730U3E/740U3E
  dmi.product.version: P07ABW
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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