Brightness hotkeys(Fn+F5 for decrease and Fn+F6 for Increase) are not working on Ubuntu 20.04. Hardware Lenovo Ideapad-5-15ITL05. It didn't work on Ubuntu 21.04 either . But I can change brightness from brightness slider.

[akash rayhan]

I used the command "watch -n1 cat /proc/interrupts". But when i pressed the brightness hot keys id didn't increased the interruptions. I also used the "acpi_listen" at that time it didn't feedback any output when i pressed the brightness hotkeys. Again I used "sudo showkey -s" it also didn't feedback any output.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: linux-image-5.11.0-22-generic 5.11.0-22.23
ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21
Uname: Linux 5.11.0-22-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: akash 1329 F.... pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Jun 23 23:41:15 2021
InstallationDate: Installed on 2021-06-21 (2 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
MachineType: LENOVO 82FG
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-22-generic root=UUID=4d6dc3f0-ff06-49a5-b093-ae70cd670931 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.11.0-22-generic N/A
 linux-backports-modules-5.11.0-22-generic N/A
 linux-firmware 1.197.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/14/2021
dmi.bios.release: 1.24
dmi.bios.vendor: LENOVO
dmi.bios.version: FHCN24WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0Q55724 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad 5 15ITL05
dmi.ec.firmware.release: 1.24
dmi.modalias: dmi:bvnLENOVO:bvrFHCN24WW:bd01/14/2021:br1.24:efr1.24:svnLENOVO:pn82FG:pvrIdeaPad515ITL05:rvnLENOVO:rnLNVNB161216:rvrSDK0Q55724WIN:cvnLENOVO:ct10:cvrIdeaPad515ITL05:
dmi.product.family: IdeaPad 5 15ITL05
dmi.product.name: 82FG
dmi.product.sku: LENOVO_MT_82FG_BU_idea_FM_IdeaPad 5 15ITL05
dmi.product.version: IdeaPad 5 15ITL05
dmi.sys.vendor: LENOVO

[Alex Hung (alexhung)]

Sounds like a BIOS issue and Lenovo seems to have a BIOS update newer than your BIOS.

*Note* BIOS updates at your own risks. Please do not do it if you are unsure.

[akash rayhan (akashrayhan)]

Yes i have upgraded the bios version but the problem still persists. Current bios version: FHCN41WW. It's working on windows.

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

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

Is the issue still present?

[Launchpad Janitor (janitor)]

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