Legion 7 16ITHg6 - Touchpad undetected

[Cameron Berkenpas]

I received my Lenovo Legion 7i 16ITHg6 laptop today. The touchpad seems to be entirely undetected.

I've attached the contents of /proc/bus/input/devices as devices.txt. No touchpad device is shown. USB mice work.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: linux-image-5.11.0-25-generic 5.11.0-25.27
ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22
Uname: Linux 5.11.0-25-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: hiryu 7344 F.... pulseaudio
 /dev/snd/controlC0: hiryu 7344 F.... pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Tue Aug 3 20:05:13 2021
InstallationDate: Installed on 2021-04-23 (103 days ago)
InstallationMedia: Kubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
MachineType: LENOVO 82K6
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-25-generic root=UUID=825f1536-7d58-4097-9779-e5df2db0a6eb ro quiet splash nvidia-drm.modeset=1 resume=/dev/mapper/swap thinkpad_acpi.fan_control=1 bluetooth.disable_ertm acpi_backlight=video vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.11.0-25-generic N/A
 linux-backports-modules-5.11.0-25-generic N/A
 linux-firmware 1.197.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/22/2021
dmi.bios.release: 1.26
dmi.bios.vendor: LENOVO
dmi.bios.version: H1CN26WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0R32862 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Legion 7 16ITHg6
dmi.ec.firmware.release: 1.26
dmi.modalias: dmi:bvnLENOVO:bvrH1CN26WW:bd05/22/2021:br1.26:efr1.26:svnLENOVO:pn82K6:pvrLegion716ITHg6:rvnLENOVO:rnLNVNB161216:rvrSDK0R32862WIN:cvnLENOVO:ct10:cvrLegion716ITHg6:
dmi.product.family: Legion 7 16ITHg6
dmi.product.name: 82K6
dmi.product.sku: LENOVO_MT_82K6_BU_idea_FM_Legion 7 16ITHg6
dmi.product.version: Legion 7 16ITHg6
dmi.sys.vendor: LENOVO

[Cameron Berkenpas (hiryu88)]

Appears to be an ELAN:

acpidump | grep ELAN
   439E0: 31 00 5F 48 49 44 70 0D 45 4C 41 4E 30 30 30 31 1._HIDp.ELAN0001

Add this ID to include/linux/input/elan-i2c-ids.h did not work.

[Kai-Heng Feng (kaihengfeng)]

If you know how to compile a kernel, can you please test the following commit:
https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel.git/commit/?h=fixes&id=2f658f7a3953f6d70bab90e117aff8d0ad44e200

[Cameron Berkenpas (hiryu88)]

I applied the diff to 5.13.8... and it worked!

Thank you!!

[Darshan Shah (se7en6998)]

Can you tell me how you fixed this issue... I am amateur person

[Cameron Berkenpas (hiryu88)]

What distribution and version are you running? Are you running a Legion
7i 16ITHg6 ? Later Ubuntu kernels have had a fix for this for some time.
Same for the vanilla Linux source.

Alas, there's still no fix for the sound on the 16ITHg6. You can only
get the left channel out of both the left and right speakers, and you'll
lose sound going to sleep. Hibernate is a work around, but Nvidia's
drivers don't seem to support hibernate reliably so I leave the Nvidia
GPU disabled for now (games aren't very good with only one audio channel
after all).

On 2/21/2022 4:37 PM, Darshan Shah wrote:
> *** This bug is a duplicate of bug 1937056 ***
> https://bugs.launchpad.net/bugs/1937056
>
> Can you tell me how you fixed this issue... I am amateur person
>