touchpad not working on Lenovo Thinkbook 15-IIL

[eduart1]

hello,
I have installed FreeBSD 15.1 on my Lenovo ThinkBook 15-IIL and have not found a way yet to make the touchpad work. The keyboard seems to be working of fine so far. The touchpad is a Buttonless Mylar® surface multi-touch touchpad.
I also loaded. ig4, iichid.

Here is my dmesg: https://termbin.com/q2o2h.
And the hw-probe: https://bsd-hardware.info/?probe=7917da3cee

 

[siladi]

Can you paste your usbconfig and xinput output ?

 

[siladi]

Looked a bit around and apparently these models are notorious for their buggy ACPI firmware. The fix might require an ACPI DSDT override. Exciting stuff

Some interesting resources while doing a shallow plunge on the topic:

ubuntu-lenovo-thinkbook-trackpad-not-working-fix/README.md at main · NZxRMGuy/ubuntu-lenovo-thinkbook-trackpad-not-working-fix

This is a fix for anyone having an issue with a Lenovo ThinkBook running Ubuntu where the mousepad/trackpad is not working. - NZxRMGuy/ubuntu-lenovo-thinkbook-trackpad-not-working-fix

github.com

Using and Debugging FreeBSD ACPI

Might be worth checking with the manufacturer for a bios update. cross fingers it might have sorted this mess out (unlikely)

 

[SirDice]

Slightly different model, but might provide some clues for yours.

M

Thread 'Lenovo Thinkbook 14-IIL-20SL, touchpad isn't detected'

Jul 13, 2024

Hi,
I have an Lenovo Thinkbook 14-IIL 20SL and installed Freebsd 14.1 and Xorg on it. The keyboard is working so far but the touchpad is not working and I would say not detected as well.
What I figured out is that the touchpad is a Buttonless Mylar® surface multi-touch touchpad found here https://psref.lenovo.com/syspool/Sys/PDF/ThinkBook/ThinkBook_14_IIL/ThinkBook_14_IIL_Spec.PDF


I tried several configurations via /usr/local/etc/X11/xorg.conf.d by copying the shared examples from /usr/local/shareX11/xorg.conf.d. In other words I tried using the libinput...

• mbauhardt
• freebsd-14.1 lenovo thinkbook touchpad
• Replies: 15
• Forum: Peripheral Hardware

• 

 

[rosorio]

Hi,

Maybe you are facing the same issue I had with my thinkbook G6.

short version:
The motherboard supports several touchpad models (Synaptics, Elan, ...)
Consequently, the firmware defers the selection until runtime,
the _INI method is supposed query the embedded controller, but because
the ACPI ECDT Namepath is broken, nothing occurs and the touchpad never works.

You can easily check that by dumping the ECDT table:

% sudo acpidump -b -n ECDT && iasl -d ecdt.dat
% grep Namepath ecdt.dsl

If the result looks like this : Namepath : "_SB.PC00.LPCB.EC0"
(here the Namepath is supposed to start with a "\", you can try to use the module I wrote acpiprobe with the correct path.

Not sure if it works, but at least we try...

Cheers
-- rodrigo