[Samsung NP-R540-JS05RU] Brightness not working

[Leonyd]

Does not change the screen brightness on Samsung R540, Samsung NC110
When using the charger is always the maximum (or near) the brightness when running on battery is close to the minimum
Ubuntu 12.04 beta updated from 11.10 i386
had a similar problem on ubuntu 11.10
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AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.94.1-0ubuntu2
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC269VB Analog [ALC269VB Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: leonyd 2449 F.... pulseaudio
 /dev/snd/controlC0: leonyd 2449 F.... pulseaudio
CRDA:
 country TW:
  (2402 - 2472 @ 40), (3, 27)
  (5270 - 5330 @ 40), (3, 17), DFS
  (5735 - 5815 @ 40), (3, 30)
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf4c00000 irq 44'
   Mixer name : 'Realtek ALC269VB'
   Components : 'HDA:10ec0269,144dc07f,00100100'
   Controls : 18
   Simple ctrls : 10
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xf0030000 irq 45'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100100'
   Controls : 6
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
CurrentDmesg:
 [ 118.217520] wlan0: no IPv6 routers present
 [ 196.716679] chrome[2839]: segfault at b ip 1ba00005 sp adec6cb0 error 6 in libc-2.15.so[1b8e1000+19e000]
 [ 574.406804] chrome[3727]: segfault at b ip 01530005 sp b421ccb0 error 6 in libc-2.15.so[1411000+19e000]
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=45881c45-4b1c-479f-9e59-0a864812b2e9
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011)
MachineType: SAMSUNG ELECTRONICS CO., LTD. R540/R580/R780/SA41/E452/E852
Package: linux (not installed)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-18-generic root=/dev/mapper/sda5_crypt ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/leonyd not ours.
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-18-generic N/A
 linux-backports-modules-3.2.0-18-generic N/A
 linux-firmware 1.71
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
Tags: precise
Uname: Linux 3.2.0-18-generic i686
UpgradeStatus: Upgraded to precise on 2012-03-14 (1 days ago)
UserGroups:

dmi.bios.date: 09/27/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 03KP.M008.20100927.LDG
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: R540/R580/R780/SA41/E452/E852
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: 03KP
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.:bvr03KP.M008.20100927.LDG:bd09/27/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnR540/R580/R780/SA41/E452/E852:pvr03KP:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR540/R580/R780/SA41/E452/E852:rvr03KP:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
dmi.product.name: R540/R580/R780/SA41/E452/E852
dmi.product.version: 03KP
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

[Fabio Marconi (fabiomarconi)]

Hello
Can you please run in a termial
apport-collect 956274
Thanks
fabio
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Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

[Fabio Marconi (fabiomarconi)]

http://www.voria.org/forum/viewforum.php?f=3&sid=a7ac4ddbd632a7fb2fe9612dcaad7e91
Here some workarounds

[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Leonyd (leonyd-b)]

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[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.3 kernel[1] (Not a kernel in the daily directory). Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag(Only that one tag, please leave the other tags). This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text.

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[1] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.3-rc7-precise/

[Joseph Salisbury (jsalisbury)]

This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report at bugzilla.kernel.org [1]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.

If you are comfortable with opening a bug upstream, It would be great if you can report back the upstream bug number in this bug report. That will allow us to link this bug to the upstream report.

[1] https://wiki.ubuntu.com/Bugs/Upstream/kernel

[Leonyd (leonyd-b)]

bugzilla.kernel.org bug 42942

[penalvch (penalvch)]

Leonyd, regarding the computer you originally filed this bug report against, what is the full computer model as noted on the sticker (ex. NP-R540-JA04US)?

[Leonyd (leonyd-b)]

Hello!
In a letter dated August 5, 2013 3:00:33 you wrote:
> Leonyd, regarding the computer you originally filed this bug report
> against, what is the full computer model as noted on the sticker (ex.
> NP-R540-JA04US)?

Full computer model:

NP-R540H; NP-R540-JS05RU

Same bug on NP-NC110-A03RU

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Best regards, Leonyd

[penalvch (penalvch)]

Leonyd, regarding only the NP-R540-JS05RU, because Samsung does not reveal what the latest BIOS is for this model, could you please download the latest firmware software as per http://www.samsung.com/ru/support/model/NP-R540-JS05RU-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

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

Thank you for your understanding.