The keys marked for brightness control on the keyboard are supposed to be Fn+F5 (down) and Fn+F6 (up).
But pressing them does not have any effects.
Volume control keys Fn+F1 (off), Fn+F2 (down), Fn+F3 (up) all do work, and KDE shows appropriate indicators when they are pressed.
I know this is a popular problem with Lenovo laptops.
I use Ubuntu 21.04 Hirsute on built-in NVMe, but Ubuntu 20.04 booted from USB flash drive also does not allow me to control screen brightness.
Hardware and OS information will be collected on Apport request and attached here.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu55
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mwg 1006 F.... pulseaudio
mwg 1010 F.... pipewire-media-
/dev/snd/seq: mwg 1005 F.... pipewire
BootLog:
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: KDE
DistUpgraded: Fresh install
DistroCodename: hirsute
DistroRelease: Ubuntu 21.04
DistroVariant: ubuntu
ExtraDebuggingInterest: I just need to know a workaround
GraphicsCard:
Intel Corporation Iris Plus Graphics G1 (Ice Lake) [8086:8a56] (rev 07) (prog-if 00 [VGA controller])
Subsystem: Lenovo Iris Plus Graphics G1 (Ice Lake) [17aa:3fd9]
HibernationDevice:
#RESUME=UUID=6932e499-f0ad-4456-b93c-2b7f9bf763dc
RESUME=UUID=ce49bc01-a59b-4abf-9110-87bc71689769
InstallationDate: Installed on 2009-11-01 (4055 days ago)
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: LENOVO 81YK
NonfreeKernelModules: wl
Package: xorg 1:7.7+19ubuntu15
PackageArchitecture: amd64
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-31-generic root=/dev/mapper/vg_c540scadaw-root64 ro rootflags=commit=3600 transparent_hugepage=always init=/lib/systemd/systemd
ProcVersionSignature: Ubuntu 5.8.0-31.33-generic 5.8.17
RelatedPackageVersions:
linux-restricted-modules-5.8.0-31-generic N/A
linux-backports-modules-5.8.0-31-generic N/A
linux-firmware 1.192
Tags: hirsute ubuntu single-occurrence reproducible has-workaround
Uname: Linux 5.8.0-31-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout dip disk kvm libvirt lpadmin netdev plugdev sambashare src
_MarkForUpload: True
dmi.bios.date: 07/06/2020
dmi.bios.release: 1.45
dmi.bios.vendor: LENOVO
dmi.bios.version: DPCN45WW
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 5 15IIL05
dmi.ec.firmware.release: 1.45
dmi.modalias: dmi:bvnLENOVO:bvrDPCN45WW:bd07/06/2020:br1.45:efr1.45:svnLENOVO:pn81YK:pvrIdeaPad515IIL05:rvnLENOVO:rnLNVNB161216:rvrNODPK:cvnLENOVO:ct10:cvrIdeaPad515IIL05:
dmi.product.family: IdeaPad 5 15IIL05
dmi.product.name: 81YK
dmi.product.sku: LENOVO_MT_81YK_BU_idea_FM_IdeaPad 5 15IIL05
dmi.product.version: IdeaPad 5 15IIL05
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.103-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.4-1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.6-2
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1907308
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.