[Asus X551MA] Brightness+fn hotkeys have no effect

[danieru]

Just installed Ubuntu 14.04.1, have run the latest updates and the brightness+fn hotkeys don't work.

WORKAROUND: I can manually change brightness by changing the integer value in:
/sys/class/backlight/intel_backlight/brightness

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-35-generic 3.13.0-35.62
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: daniel 6053 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Sep 21 20:04:34 2014
HibernationDevice: RESUME=UUID=affed0d6-9557-4f63-a7ef-c3cb512ca3ee
InstallationDate: Installed on 2014-09-17 (3 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64+mac (20140722.2)
Lsusb:
 Bus 001 Device 008: ID 04f2:b404 Chicony Electronics Co., Ltd
 Bus 001 Device 004: ID 13d3:3414 IMC Networks
 Bus 001 Device 006: ID 046d:c52f Logitech, Inc. Unifying Receiver
 Bus 001 Device 002: ID 8087:07e6 Intel Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. X551MA
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=f21594bd-0358-4c53-b9de-d73ab59ad34a ro persistent quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-35-generic N/A
 linux-backports-modules-3.13.0-35-generic N/A
 linux-firmware 1.127.5
SourcePackage: linux
StagingDrivers: rtl8821ae
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/12/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X551MA.512
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X551MA
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.:bvrX551MA.512:bd08/12/2014:svnASUSTeKCOMPUTERINC.:pnX551MA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX551MA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: X551MA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Brad Figg (brad-figg)]

This change was made by a bot.

[danieru (samuraidanieru)]

Just discovered that I can manually change brightness by changing the integer value in:

/sys/class/backlight/intel_backlight/brightness

[penalvch (penalvch)]

danieru, thank you for reporting this and helping make Ubuntu better. Could you please test the latest upstream kernel available from the very top line at the top of the page (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. 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 exactly shown as:
kernel-fixed-upstream-3.17-rc6

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.

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

[danieru (samuraidanieru)]

same problems with latest upstream kernel, 3.17-rc6.

While running acpi_listen, I can see that the following fn hotkeys show no response:

fn+F2 wifi
fn+F5 decrease brightness
fn+F6 increase brightness
fn+F8 screen output

[danieru (samuraidanieru)]

Can anyone provide some simple steps on how to identify the information I need to map these properly? I've poked around with google, and found for example a wiki page on evtest here:

https://wiki.ubuntu.com/DebuggingTouchpadDetection/evtest

I installed and ran evtest, but the wiki entry makes no mention of *which* log file to upload, and how the information in said log file is useful.

[penalvch (penalvch)]

danieru, as per http://www.asus.com/us/Notebooks_Ultrabooks/X551MA/HelpDesk_Download/ an update to your computer's buggy and outdated BIOS is available (513). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything? If it doesn't, 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

For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette .

Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report.

Once the BIOS is updated, then please mark this report Status Confirmed.

Thank you for your understanding.

[danieru (samuraidanieru)]

updated to 513 and still same problem.

[penalvch (penalvch)]

danieru, could you please provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

[danieru (samuraidanieru)]

Hi Christopher,
Don't have access to the computer in question just now, but I could try to get to it soon. It would be great to know if there's a chance that this issue will be fixed before I take more time on it however.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]