Touchpad not recognizable

Help
1

On my new Lenovo Yoga Slim 7 14ITL05 (Intel version), the touchpad is not recognizable by any version of NixOS. On Fedora/Ubuntu live everything works fine.

What I have tried:

  • libinput/synaptics turn on/off and vice versa
  • load elan_i2c module via initrd.kernelModules
  • added elan_i2c to blacklistedKernelModules
  • switching kernels 5.10/5.15/5.17
  • dancing with psmouse module

No results. xinput/evtest/libinput doesn’t see my touchpad at all.
But if it works on Ubuntu or Fedora, it could work on NixOS, I just don’t know how to turn it on.

My config Olexiy Galchenko / nixos-config · GitLab

Note: On Lenovo Yoga Slim 7 14ITL05 there is no Fn+“Touchpad On/Off” button. There are no touchpad settings in BIOS.

2

I see you have services.xserver.libinput.enable = false;. In my https://frame.work laptop I had to enabled it in order for the touchpad to work, I’m using linux 5.17.7

There is also:

you may want to give that a look, as it contains modules for Lenovo ThinkPad L13 Yoga, Lenovo ThinkPad X1 Yoga
and Lenovo ThinkPad X13 Yoga. It may solve your problem

3

Thanks for the reply.
libinput\synaptics won’t help.
I already tested some solutions from nix-hardware, with no results.

4

Anything in dmesg or journalctl?

5

Nothing for ‘touch’/‘synap’/‘elan’.

6

Nothing there, same for

lshw https://pastebin.com/dvMhWhW2

lspci https://pastebin.com/j3J8SsAb

and xinput https://pastebin.com/wJywQZZf

But on Fedora live, there is a device in xinput list, called ELANXXXXXX,

As for me, looks like NixOS ignores this device due to some reason.

7

The touchpad wasn’t working on NixOS live image, unfortunately. It was working on Fedora and even Ubuntu. Btw, I did the collection of the modules/dmesg/lshw commands output from Fedora live image and compare them all with my current NixOS configuration. Of Fedora, kernel loads hid_multitouch modules and recognizes touchpad like this:

hid-multitouch 0018:04F3:3124.0004: input,hidraw4: I2C HID v1.00 Mouse [ELAN0000:00 04F3:3124] on i2c-ELAN0000:00

I have added this module to the initrd.kernelModules = [ “psmouse” “hid_multitouch”], it’s loaded, but with no touchpad …

stage-1-init: [Sun May 22 11:00:14 UTC 2022] loading module hid_multitouch…

8

Fedora uses a relatively recent kernel and Ubuntu often backports things. Which kernel version did you just try in your latest comment? Try linuxPackages_latest.

Anything in dmesg?

9

Now I’m on 5.17.9, before it was 5.17.5

hardware.enableRedistributableFirmware not helping

lshw https://pastebin.com/dvMhWhW2
lspci https://pastebin.com/j3J8SsAb
xinput https://pastebin.com/wJywQZZf
dmesg https://pastebin.com/Q2H0aPxD

10

I’m having an issue with a synaptics touchpad since kernel 5.19 ref Synpatics touchpad missing with kernel 5.19 · Issue #185623 · NixOS/nixpkgs · GitHub which is admittedly a different albeit related problem.

11

I am having the same problem. Works with kernel 5.18 but not 5.19.

12

The fix has already been merged to master.

If you want a workaround (requires compiling the kernel locally which is anything but quick):

        boot.kernelPatches =  [
          {
            name = "pinctrl_amd";
            patch = null;
            extraConfig = ''
              PINCTRL_AMD y
            '';
          }
        ];
13

Hello, I have the same problem.

I also have a Lenovo Yoga Slim 7 (15IMH05).
I am very new to NixOs.

@peterhoeg said that a fixed has been merged, but the version of NixOs that i have (22.11 Raccoon) still doesn’t work to me.

I tryed to copy paste the workaround, but it doesn’t worked.
Do you have any idea how to fix this bug ?
@AlexG Did you fix it ?
Sorry to revive this topic, I’m also new to forums

14

I was having the same issue with my Lenovo Yoga Slim 7.

I noticed that when in the shell, there would be an error popping up every time I touched the touchpad. This error was in relation to elan_i2c, which is a kernel module.

I did some digging and found out that disabling the elan_i2c module my touchpad would work.
This was found on the Arch Linux forums:
https://bbs.archlinux.org/viewtopic.php?id=266406

To disable the module I added the following line to my configuration.nix file:

boot.blacklistedKernelModules = [ "elan_i2c" ];

Just a side note I didn’t need libinput.enable = true; to work.