8086:0046 Backlight control keys doesn't work with Acer Aspire 5733Z-P623G32Mikk

[Full inu]

My Acer Aspire 5733Z cannot change brightness by hotkeys or by System settings menu by default. The following parameter shuts down WiFi and modem:
GRUB_CMDLINE_LINUX="acpi=off"

WORKAROUND: The following parameters work but no pop-up message for scale is displayed:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

---
ApportVersion: 2.12.5-0ubuntu2
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: isshin 1474 F.... pulseaudio
                      isshin 2078 F.... pulseaudio
DistroRelease: Ubuntu 13.10
InstallationDate: Installed on 2013-10-20 (0 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
MachineType: Acer Aspire 5733Z
MarkForUpload: True
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=746dde1a-b219-49fa-ab1d-f9c1ca35c54d ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
RelatedPackageVersions:
 linux-restricted-modules-3.11.0-12-generic N/A
 linux-backports-modules-3.11.0-12-generic N/A
 linux-firmware 1.116
Tags: saucy
Uname: Linux 3.11.0-12-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 08/13/2012
dmi.bios.vendor: Acer
dmi.bios.version: V1.10
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 5733Z
dmi.board.vendor: Acer
dmi.board.version: V1.10
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.10
dmi.modalias: dmi:bvnAcer:bvrV1.10:bd08/13/2012:svnAcer:pnAspire5733Z:pvrV1.10:rvnAcer:rnAspire5733Z:rvrV1.10:cvnAcer:ct10:cvrV1.10:
dmi.product.name: Aspire 5733Z
dmi.product.version: V1.10
dmi.sys.vendor: Acer

[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 1242292

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.

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[Full inu (full-inu)]

apport information

[madbiologist (me-again)]

This should be fixed in the upstream 3.14-rc4 kernel by these two commits:

commit bd8ba20597f0cfef3ef65c3fd2aa92ab23d4c8e1 - ACPI / video: Filter the _BCL table for duplicate brightness values
commit 0e9f81d3b7cd0649a3bc437391b6a0650f98f844 - ACPI / video: Add systems that should favour native backlight interface

The first one has been cc'd to the stable kernel series. A PPA of the 3.14-rc4 kernel is available at http://kernel.ubuntu.com/~kernel-ppa/mainline/ and instructions on how to install and uninstall it are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds

[Full inu (full-inu)]

Yes, kernel 3.14-rc4 fix this problem. Thanks!!!

[Jonatã Bolzan Loss (jbopen)]

Unfortunatelly, bug present in Ubuntu 14.04 release.

[Full inu (full-inu)]

jonata, yes, but you can install new kernel from Ubuntu Kernel PPA, as example
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-rc1-trusty/

Also it is very interesting - which version of kernel will present in Ubuntu 14.10 testing? Will Canonical skip 3.14 version and start testing 3.15? :)