No Brightness Control on ASUS X301A-RX130H

[Ptitphysik]

On ASUS X301A-RX130H, shortcuts fn+f5 (decrease brightness) and fn+f6 (increase brightness) do not work.

All other shortcut FN + * work.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-21-generic 3.5.0-21.32
ProcVersionSignature: Ubuntu 3.5.0-21.32-generic 3.5.7.1
Uname: Linux 3.5.0-21-generic x86_64
ApportVersion: 2.6.1-0ubuntu9
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: malpouch 2014 F.... pulseaudio
 /dev/snd/pcmC0D0p: malpouch 2014 F...m pulseaudio
Date: Wed Jan 2 12:48:07 2013
HibernationDevice: RESUME=UUID=75b627f5-cf9b-4b65-9f8b-0fc77e4db04a
InstallationDate: Installed on 2012-12-21 (12 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: ASUSTeK COMPUTER INC. X301A
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-21-generic root=UUID=772db45b-f3ad-4e35-9d91-7d583ac4c2e6 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.5.0-21-generic N/A
 linux-backports-modules-3.5.0-21-generic N/A
 linux-firmware 1.95
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:

dmi.bios.date: 08/20/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X301A.209
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X301A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX301A.209:bd08/20/2012:svnASUSTeKCOMPUTERINC.:pnX301A:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX301A:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: X301A
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Brad Figg (brad-figg)]

This change was made by a bot.

[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 v3.8 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/v3.8-rc1-raring/

[Ptitphysik (amalpeyre)]

The new kernel does not solve the problem.

Now the brightness is set to maximum by default and i can't decrease it in settings.

[penalvch (penalvch)]

Ptitphysik, thank you for reporting this and helping make Ubuntu better. As per http://support.asus.com/Download.aspx?SLanguage=en&m=X301A&p=3&s=414 an update is available for your BIOS (210). If you update to this, does it change anything?