Screen Brightness keys do not work on Lenovo IdeaPad 3

[Lex Ross]

I've installed Ubuntu 21.10 with recent updates from scratch, and screen brightness control hot keys do not work. I can adjust brightness with slide bar in settings, and also with
$ echo 2000 | sudo tee /sys/class/backlight/intel_backlight/brightness
Both acpi_listen and 'sudo showkey' commands show no events, not even in a console.

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: linux-image-5.13.0-20-generic 5.13.0-20.20
ProcVersionSignature: Ubuntu 5.13.0-20.20-generic 5.13.14
Uname: Linux 5.13.0-20-generic x86_64
ApportVersion: 2.20.11-0ubuntu70
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: lex 1476 F.... pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 22 19:24:38 2021
InstallationDate: Installed on 2021-10-21 (1 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
MachineType: LENOVO 82H7
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.13.0-20-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.13.0-20-generic N/A
 linux-backports-modules-5.13.0-20-generic N/A
 linux-firmware 1.201
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/13/2021
dmi.bios.release: 1.20
dmi.bios.vendor: LENOVO
dmi.bios.version: GGCN20WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: NO DPK
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad 3 14ITL6
dmi.ec.firmware.release: 1.20
dmi.modalias: dmi:bvnLENOVO:bvrGGCN20WW:bd01/13/2021:br1.20:efr1.20:svnLENOVO:pn82H7:pvrIdeaPad314ITL6:skuLENOVO_MT_82H7_BU_idea_FM_IdeaPad314ITL6:rvnLENOVO:rnLNVNB161216:rvrNODPK:cvnLENOVO:ct10:cvrIdeaPad314ITL6:
dmi.product.family: IdeaPad 3 14ITL6
dmi.product.name: 82H7
dmi.product.sku: LENOVO_MT_82H7_BU_idea_FM_IdeaPad 3 14ITL6
dmi.product.version: IdeaPad 3 14ITL6
dmi.sys.vendor: LENOVO

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

This change was made by a bot.

[Jaymz (jaymz-rg)]

I'm having this problem, too!!! Ideapad 3 15ITL05 model. I'm on Ubuntu 21.10, also.

Yes, the brightness controller in the top-right drop-down menu works, but it's more convenient to use the F11/F12 keys.

[Launchpad Janitor (janitor)]

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

[martin (veet88)]

Ubuntu 22.02 LTS also affected

[Launchpad Janitor (janitor)]

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