kernel-packages team mailing list archive

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

Ed Mente, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. 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. For example:
kernel-fixed-upstream-v3.11-rc4

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. As well, please remove the tag:
needs-upstream-testing

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

As well, please remove the tag:
needs-upstream-testing

If you are unable to test the mainline kernel, please comment as to why specifically you were unable to test it and add the following tags:
kernel-unable-to-test-upstream
kernel-unable-to-test-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.

** Tags removed: kernel-bug-exists-upstream
** Tags added: kernel-bug-exists-upstream-v3.7 needs-full-computer-model needs-upstream-testing

** Tags removed: needs-full-computer-model
** Tags added: latest-bios-08ji

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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1092517

Title:
  [Samsung N220] Cannot control backlight using the keyboard keys on
  Ubuntu Server

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  The problem appears in console mode only and it is that the backlight
  cannot be controlled with the Fn keys. It can neither be adjusted nor
  turned off.

  The machine runs Ubuntu Server 12.04.1 LTS and is Samsung N220 netbook
  with a sun readable PixelQi display.

  uname -a :
  Linux clterm 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

  ls /sys/class/backlight :
  intel_backlight
  samsung

  I have put acpi_backlight=vendor kernel parameter as setting acpi
  video backlight does not have any effect.

  This works ok:
  echo 200 |sudo dd of=/sys/class/backlight/intel_backlight/brightness

  This also works ok:
  echo 4 |sudo dd of=/sys/class/backlight/samsung/brightness

  The above commands work differently though. The first one allows
  controlling in great ranges, while the second controls the backlight
  within some bounds.

  With acpi=off, the Fn keys function correctly in the console.

  Your help is appreciated!
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info: Error: [Errno 2] No such file or directory
  Card0.Amixer.values: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 12.04
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=5222a4fe-9efb-4de0-823d-82a44027cb1f
  InstallationMedia: Ubuntu-Server 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120817.3)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. N150/N210/N220
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-29-generic root=UUID=a357370c-979e-45c4-954b-0d62b3dc9df5 ro acpi_backlight=vendor
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-29-generic N/A
   linux-backports-modules-3.2.0-29-generic  N/A
   linux-firmware                            1.79.1
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  precise
  Uname: Linux 3.2.0-29-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 03/25/2010
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 08JI.M073.20100325.JIP
  dmi.board.asset.tag: SAMSUNG
  dmi.board.name: N150/N210/N220
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr08JI.M073.20100325.JIP:bd03/25/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnN150/N210/N220:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnN150/N210/N220:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
  dmi.product.name: N150/N210/N220
  dmi.product.version: Not Applicable
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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