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:
USERPID 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
