Backlightlevel not changeable with Kernel 3.2.0-34-generic

[Exoon]

With Kernel 3.2.0-33-generic the backlight controll ist working (FN+UP/DOWN) but with Kernel 3.2.0-34-generic only the Icon is shown and the level is not changing.

Xubuntu 12.04 i386 Samsunf nf210
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC269VB Analog [ALC269VB 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: ALC269VB Analog [ALC269VB Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: usrr 1734 F.... xfce4-volumed
                      usrr 1743 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 47'
   Mixer name : 'Realtek ALC269VB'
   Components : 'HDA:10ec0269,144dc08c,00100100'
   Controls : 19
   Simple ctrls : 11
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=79ff2089-dee3-4ebc-ae1b-338f37e679ee
InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MachineType: SAMSUNG ELECTRONICS CO., LTD. NF110/NF210/NF310
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
 LANGUAGE=de_DE:en
 TERM=xterm
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-34-generic root=/dev/mapper/vgcrypt-root ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-34.53-generic 3.2.33
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-34-generic N/A
 linux-backports-modules-3.2.0-34-generic N/A
 linux-firmware 1.79.1
Tags: precise
Uname: Linux 3.2.0-34-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo www-data
dmi.bios.date: 10/04/2010
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 02MY.M019.20101004.JIP
dmi.board.asset.tag: SAMSUNG
dmi.board.name: NF110/NF210/NF310
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.:bvr02MY.M019.20101004.JIP:bd10/04/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnNF110/NF210/NF310:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNF110/NF210/NF310:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
dmi.product.name: NF110/NF210/NF310
dmi.product.version: Not Applicable
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1091456

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Exoon (exoon)]

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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 v3.7 kernel[0] (Not a kernel in the daily directory) and install both the linux-image and linux-image-extra .deb packages.

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.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-raring/

[Exoon (exoon)]

Works with the with 3.7.1-030701

I think it is better for me to use the old 3.2.0-33 kernel instead of 3.7.1-030701, right?

[Graeme Hewson (ghewson)]

Duplicate of bug 1085270.

[Exoon (exoon)]

Bug already fixed.

[Exoon (exoon)]

Sorry, my fault. It isn't fix in Xubuntu 12.04 till now.

[Exoon (exoon)]

Still not fixed. Changing the backlightlevel is not possible in 3.2.0-49-generic

[Exoon (exoon)]

A solution is here: https://launchpad.net/~voria/+archive/ppa

[penalvch (penalvch)]

Exoon, could you please confirm this issue exists with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

[Exoon (exoon)]

I test it with an image loaded today and changing brightness works out of the box.

saucy-desktop-i386.iso 1c125e4d1d29bfe4da0c8c54fb713b3e

[penalvch (penalvch)]

Exoon, would you need a backport to a release prior to Saucy, or may we mark this Status Invalid?