Public bug reported:
Hardware:
Lenovo IdeaPad 3 15ALC6
DMI product_name: 82KU
DMI product_version: IdeaPad 3 15ALC6
Kernel:
7.0.0-31-generic
Problem:
The system fan works normally under firmware/EC control, but its RPM is
not exposed through Linux hwmon/lm-sensors.
Observed:
$ modinfo yogafan
modinfo: ERROR: Module yogafan not found.
$ grep CONFIG_SENSORS_YOGAFAN /boot/config-$(uname -r)
CONFIG_SENSORS_YOGAFAN is not present.
Current hwmon devices:
ADP0
BAT0
nvme
k10temp
amdgpu
No fan*_input or PWM interface is exposed.
Upstream Linux includes the yogafan hwmon driver and Lenovo IdeaPad 3
15ALC6 (82KU) is listed as supported hardware.
Expected:
With yogafan support enabled, fan RPM should be exposed through the
standard hwmon interface (fan*_input) and become visible to tools such
as lm-sensors.
Request:
Please consider enabling or backporting CONFIG_SENSORS_YOGAFAN for
Ubuntu kernels supporting this hardware.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-31-generic 7.0.0-31.31
ProcVersionSignature: Ubuntu 7.0.0-31.31-generic 7.0.14
Uname: Linux 7.0.0-31-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/controlC1',
'/dev/snd/hwC1D0', '/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D0p',
'/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0',
'/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: pass
Date: Sat Sep 12 16:08:26 2026
InstallationDate: Installed on 2026-08-18 (25 days ago)
InstallationMedia: Ubuntu-Server 26.04 "Resolute Raccoon" - Release amd64
(20260420.1)
MachineType: LENOVO 82KU
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-31-generic
root=UUID=59aa6ae4-acbd-4b71-9752-4627997b9853 ro video=HDMI-A-1:1920x1080@60e
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/19/2025
dmi.bios.release: 1.68
dmi.bios.vendor: LENOVO
dmi.bios.version: GLCN68WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76466WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad 3 15ALC6
dmi.ec.firmware.release: 1.60
dmi.modalias:
dmi:bvnLENOVO:bvrGLCN68WW:bd03/19/2025:br1.68:efr1.60:svnLENOVO:pn82KU:pvrIdeaPad315ALC6:rvnLENOVO:rnLNVNB161216:rvrSDK0T76466WIN:cvnLENOVO:ct10:cvrIdeaPad315ALC6:skuLENOVO_MT_82KU_BU_idea_FM_IdeaPad315ALC6:pfaIdeaPad315ALC6:
dmi.product.family: IdeaPad 3 15ALC6
dmi.product.name: 82KU
dmi.product.sku: LENOVO_MT_82KU_BU_idea_FM_IdeaPad 3 15ALC6
dmi.product.version: IdeaPad 3 15ALC6
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute
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https://bugs.launchpad.net/bugs/2167170
Title:
Lenovo IdeaPad 3 15ALC6 (82KU): fan RPM unavailable because yogafan
driver is not enabled
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