[ASUS X200LA] brightness hotkeys not working

[Jaime Pérez]

If I click on brightness hotkeys nothing happens.

WORKAROUND: acpi_osi=

Upstream report:
https://bugzilla.kernel.org/show_bug.cgi?id=70241

---
ApportVersion: 2.19.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jaime 1695 F.... pulseaudio
 /dev/snd/controlC1: jaime 1695 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.10
HibernationDevice: RESUME=UUID=62156bbd-ae1e-42da-96ea-465de864e742
InstallationDate: Installed on 2015-10-09 (1 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
MachineType: ASUSTeK COMPUTER INC. X200LA
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-14-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro debug acpi_osi=
ProcVersionSignature: Ubuntu 4.2.0-14.16-generic 4.2.2
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-14-generic N/A
 linux-backports-modules-4.2.0-14-generic N/A
 linux-firmware 1.149
Tags: wily
UdevLog: Error: [Errno 2] No existe el archivo o el directorio: '/var/log/udev'
Uname: Linux 4.2.0-14-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 06/16/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X200LA.204
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X200LA
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.:bvrX200LA.204:bd06/16/2014:svnASUSTeKCOMPUTERINC.:pnX200LA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX200LA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: X200LA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Jaime Pérez (jaime-91)]

upgrading to 3.14 or 3.15 from ubuntu kernel ppa doesn't fix the problem.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Luigi Maselli (grigio)]

I confirm the bug on Asus Sonicmaster.
Maybe adding this line to grub will allow to manage it via brightness control panel

GRUB_CMDLINE_LINUX_DEFAULT="..... acpi_backlight=vendor"

[Luigi Maselli (grigio)]

http://askubuntu.com/questions/489247/14-04-asus-g56jr-fn-brightness-control

[Jaime Pérez (jaime-91)]

sudo sed 's/GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"/GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="/' -i /etc/default/grub

update-grub

[Speranskiy (sprnza)]

@Jaime Pérez thank you! Post #5 has helped me!

[Jaime Pérez (jaime-91)]

^^ you are wellcome!

[Jaime Pérez (jaime-91)]

ASUS X200LA-CT012H

debug options in grub that fix the problem:
debug acpi_osi= acpi_sleep=s3_bios acpi_backlight=intel

[Jaime Pérez (jaime-91)]

dmesg with debuging options that fix the problem

[Jaime Pérez (jaime-91)]

Sorry, that was for another post

[Jaime Pérez (jaime-91)]

Fix only works for 3.13

[Jaime Pérez (jaime-91)]

I reported bug to bugzilla.kernel, because there is a similar problem in mainline and testing.

[Jaime Pérez (jaime-91)]

https://bugzilla.kernel.org/show_bug.cgi?id=88941

[Jaime Pérez (jaime-91)]

This patch solves the problem. But minimum in brightness is the screen off.

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[penalvch (penalvch)]

Jaime Pérez, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect -p linux 1327774

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Jaime Pérez (jaime-91)]

You have all the needed info in bugzilla. The problem was the acpi driver detecting less than 8 inputs, and the asignee made a patch (which I pasted here) that fixed the problem. He said they needed to find a better solution to the issue, because the patch wasn't the best solution. I won't give more information.

[penalvch (penalvch)]

Jaime Pérez, this is not In Progress as defined in https://wiki.ubuntu.com/Bugs/Status .

[Jaime Pérez (jaime-91)]

Please include patch in kernel. I don't know if its fixed in mainline, but there is a patch for the bug that fix the problem. I 'm having this problem since 2013 and there is a patch, why about using it?

[penalvch (penalvch)]

Jaime Pérez, if you want a fix, you would want to do as previously requested in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1327774/comments/16 . Just because you posted a patch doesn't mean the information isn't needed.

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

apport information

[Jaime Pérez (jaime-91)]

I got an error when running that command:
apport-collect -p linux 1327774
The authorization page:
 (https://launchpad.net/+authorize-token?oauth_token=5ZtJrCm80qzgHR3w0CtF&allow_permission=DESKTOP_INTEGRATION)
should be opening in your browser. Use your browser to authorize
this program to access Launchpad on your behalf.
Waiting to hear from Launchpad about your decision...

(process:2913): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
dpkg-query: no se ha encontrado ningún paquete que corresponda con linux.

[Jaime Pérez (jaime-91)]

BTW i ran the command using acpi_osi="" in grub_cmdline_linux_default

[Jaime Pérez (jaime-91)]

In bugzilla they said that they were working on a propper fix to the problem, the patch is only a pass by

[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

Jaime Pérez, thanks for that. Due to how the Ubuntu Kernel Team tends to pull only from Linus's stable tree (there are exceptions to this), the attached patch wouldn't fit the criteria for inclusion, especially given a WORKAROUND. However, given Dmitry Tunin et. al. are aware of the issue, and have advised they are still working on it, I'll mark this Triaged for now.

[Jaime Pérez (jaime-91)]

Thanks, for now using acpi_osi="" in cmdline works