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[Carlo Cavalieri D'Oro <carlodoro88@xxxxxxxxx>]

I've fixed this problem in this way:

1) sudo gedit /etc/default/grub

2) In this row GRUB__CMDLINE___LINUX__DEFAULT="quiet splash"

I've added acpi___backlight=vendor -->

GRUB_CMDLINELINUX_DEFAULT="quiet splash acpi_backlight=vendor"

3) I saved the file and close it.

4)  sudo update-grub

5) Reboot the system and I've tried special key Fn.


Thank you to everybody.

Bye.

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

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Carlo Cavalieri D'Oro (carlodoro88)

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https://bugs.launchpad.net/bugs/1085270

Title:
  problem brightness adjustment by Fn keys with linux-image-3.2.0-34
  -generic-pae

Status in “linux” package in Ubuntu:
  Fix Committed

Bug description:
  I've a netbook samsung n150 with ubuntu 12.04, yesterday when I've
  upgraded from kernel version 3.2.0-33-52 to 3.2.0-34.53 immediately it
  didn't work fn keys for brightness of monitor.....it didn't effect!!!
  and also this kernel is very slow in perfomance than old kernel
  3.2.0-33-52. in this moment i am using the previous kernel.

  I wait from you that you'll improve this kernel because i've just read
  other message about problems on the same kernel.

  Wait your reply,

  thanks,

  carlo.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-33-generic-pae 3.2.0-33.52
  ProcVersionSignature: Ubuntu 3.2.0-33.52-generic-pae 3.2.31
  Uname: Linux 3.2.0-33-generic-pae i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  carlo      1383 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 47'
     Mixer name	: 'Realtek ALC269'
     Components	: 'HDA:10ec0269,144dc072,00100004'
     Controls      : 19
     Simple ctrls  : 11
  Date: Sat Dec  1 00:46:37 2012
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. N150/N210/N220
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-33-generic-pae root=UUID=c5710f67-e3e3-42bf-9bfa-ffa7a7669858 ro
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-33-generic-pae N/A
   linux-backports-modules-3.2.0-33-generic-pae  N/A
   linux-firmware                                1.79.1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/09/2010
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 05JI.M039.20100109.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.:bvr05JI.M039.20100109.JIP:bd01/09/2010: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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