Screen Backlight on Sony Vaio SVE171G12L

[Pixnbits]

acpi backlight driver didn't change brightness, but intel_backlight did
hotkeys were not mapped to intel_backlight
after much google grep'ing the only instructions that worked getting the connection were https://wiki.ubuntu.com/Kernel/Debugging/Backlight#Intel_HD_Graphic_Controllers
(adding 80-backlight.conf)

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: pixnbits 1820 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Sep 16 12:53:34 2014
HibernationDevice: RESUME=UUID=91db77a4-426f-4e00-ab65-6d360d66fb8e
InstallationDate: Installed on 2014-09-11 (5 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Sony Corporation SVE17132CXB
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic.efi.signed root=UUID=04da7c66-3e8f-4e0f-be89-b76c4123092b ro quiet splash acpi_backlight=vendor 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
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/13/2012
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: R0160D6
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnInsydeCorp.:bvrR0160D6:bd11/13/2012:svnSonyCorporation:pnSVE17132CXB:pvrC904W99J:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: SVE17132CXB
dmi.product.version: C904W99J
dmi.sys.vendor: Sony Corporation

[Pixnbits (uone-f)]

stickers on the back say
Model: SVE171G12L
Product Name: SVE17132CXB
Service Tag: C904W99J

sorry for the confusion

[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 v3.17 kernel[0].

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/v3.17-rc5-utopic/

[Brad Figg (brad-figg)]

This change was made by a bot.

[Launchpad Janitor (janitor)]

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