18.10 update: keyboard backlight stopped working

[Michael Weimann]

I've updated to the Ubuntu 18.10 beta release. Since then my keyboard backlight stopped working. The function keys still display the keyboard backlight brightness control icon on screen, but it doesn't change.

I'm using kernel 4.18.0-10-generic.

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.18.0-10-generic 4.18.0-10.11
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
Uname: Linux 4.18.0-10-generic x86_64
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mweimann 15267 F.... pulseaudio
CurrentDesktop: GNOME
Date: Sat Oct 13 20:18:22 2018
InstallationDate: Installed on 2017-12-20 (296 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 8087:0a2b Intel Corp.
 Bus 001 Device 002: ID 13d3:5a09 IMC Networks
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. UX331UN
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic root=UUID=e117a09c-da54-44f2-b41a-8cd26a874ac4 ro quiet splash nouveau.modeset=0 nouveau.runpm=0 vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.18.0-10-generic N/A
 linux-backports-modules-4.18.0-10-generic N/A
 linux-firmware 1.175
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/08/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX331UN.301
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX331UN
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.:bvrUX331UN.301:bd11/08/2017:svnASUSTeKCOMPUTERINC.:pnUX331UN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX331UN:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: UX
dmi.product.name: UX331UN
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.