Public bug reported:
Hardware keys stopped working after update. Brightness slider on Gnome
doesn't work either.
video/brightnessup BRTUP 00000086 00000000
video/brightnessdown BRTDN 00000087 00000000
1) Description: Ubuntu 16.04.2 LTS
Release: 16.04
2) Don't know
3) Brightness should changes when pressing keys
4) Nothing happens. Cannot change brightness at all
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-71-lowlatency 4.4.0-71.92
ProcVersionSignature: Ubuntu 4.4.0-71.92-lowlatency 4.4.49
Uname: Linux 4.4.0-71-lowlatency x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Apr 2 17:46:59 2017
HibernationDevice: RESUME=UUID=bed206f0-1ff7-49c9-a68b-7dac372bd5bf
InstallationDate: Installed on 2014-08-12 (963 days ago)
InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.1)
MachineType: LENOVO 20217
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-71-lowlatency
root=UUID=9efb81ed-07fb-4e49-a2a2-d9161376d08e ro acpi_osi=Linux quiet splash
acpi_backlight=vendor vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-71-lowlatency N/A
linux-backports-modules-4.4.0-71-lowlatency N/A
linux-firmware 1.157.8
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2017-04-02 (0 days ago)
dmi.bios.date: 09/18/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 74CN44WW(V3.05)
dmi.board.asset.tag: No Asset Tag
dmi.board.name: VIQY0Y1
dmi.board.vendor: LENOVO
dmi.board.version: 31900058STD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad Y510P
dmi.modalias:
dmi:bvnLENOVO:bvr74CN44WW(V3.05):bd09/18/2013:svnLENOVO:pn20217:pvrLenovoIdeaPadY510P:rvnLENOVO:rnVIQY0Y1:rvr31900058STD:cvnLENOVO:ct10:cvrLenovoIdeaPadY510P:
dmi.product.name: 20217
dmi.product.version: Lenovo IdeaPad Y510P
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug trusty xenial
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https://bugs.launchpad.net/bugs/1678627
Title:
Controlling brightness stopped working after update from 14.04 to
16.04
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