Brightness Hotkeys FN (F5,F6) not working in Asus F555L

[yevhen]

Brightness Hotkeys FN (F5,F6) not working.

WORKAROUND: I can adjust the backlight when I click on Power Settings then screen brightness.

---
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: yevhen 2338 F.... pulseaudio
 /dev/snd/controlC0: yevhen 2338 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.10
HibernationDevice: RESUME=UUID=a4a0847f-abca-4a89-b8e3-a0a4bfba845c
InstallationDate: Installed on 2015-11-28 (16 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
 Bus 001 Device 003: ID 0bda:57b5 Realtek Semiconductor Corp.
 Bus 001 Device 002: ID 248a:8564
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. X555LB
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-19-generic.efi.signed root=UUID=cb214afc-47f5-4e1e-9d00-77f967de126f ro quiet splash acpi_backlight=vendor vt.handoff=7
ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-19-generic N/A
 linux-backports-modules-4.2.0-19-generic N/A
 linux-firmware 1.149.3
Tags: wily
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
Uname: Linux 4.2.0-19-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 08/24/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X555LB.505
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X555LB
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX555LB.505:bd08/24/2015:svnASUSTeKCOMPUTERINC.:pnX555LB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX555LB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: X555LB
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[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 1525969

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.

[penalvch (penalvch)]

yevhen, thank you for reporting this and helping make Ubuntu better.

At your earliest convenience, could you please test the latest upstream kernel available from the very top line at the top of the page from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D (the release names are irrelevant for testing, and please do not test the daily folder)? Install instructions are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds . This will allow additional upstream developers to examine the issue.

If testing on your main install would be inconvenient, one may:
1) Install Ubuntu to a different partition and then test this there.
2) Backup, or clone the primary install.

If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where X, and Y are the first two numbers of the kernel version, and Z is the release candidate number if it exists.

If the mainline kernel does not fix the issue, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream.

Once testing of the latest upstream kernel is complete, please mark this report's Status as Confirmed. Please let us know your results.

Thank you for your understanding.

[yevhen (y-baidiuk)]

 the latest kernel did not fix this issue

kernel-fixed-upstream
kernel-fixed-upstream-4.4.0-040400rc5-generic

[penalvch (penalvch)]

yevhen, could you please advise if any of the WORKAROUNDs allow you to adjust the backlight via https://wiki.ubuntu.com/Kernel/Debugging/Backlight ?

[yevhen (y-baidiuk)]

i can adjust the backligh wenn i click on Power Settings then screen brightness ...

[yevhen (y-baidiuk)]

I have no idea.

[penalvch (penalvch)]

yevhen, regarding https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1525969/comments/18 could you please advise?

[Launchpad Janitor (janitor)]

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

[yevhen (y-baidiuk)]

I did a Video .
https://www.youtube.com/watch?v=AeF02zoLQi0
Sorry that my English is so pur.