Home / ubuntu / Questions / 1404849
In Process
opinion_no9
Asked: 2022-04-27 11:40:47 +0800 CST

Touchpad + keyboard issues with Laptop Fujitsu Lifebook E5511 (same issue like Dell and HP, ....) ELAN „DesignWare“ tablet mode „i2c-hid-acpi“

  • 772

Problem with all of them: Drivers get mental thinking its a TABLET ! The Laptop is no tablet ....

  • keyboard not working
  • touchpad not working

Applies to Ubuntu, Xubuntu, ... 18.x, 19.x, 20.x, 21.x, 22.04

THANKs to the may great, smart, encouraged, skilled people who invented all the details I collect and stuff together in the following as a solution proven to work in my machines - might their well being last forever.

keyboard

1 Answers

  1. Problem & solution here:

    1. keyboard wrong kernel module "elants_i2c" gets loaded.
      There is no ELAN touchpad present.
      This device has a „DesignWare“ Touchpad (which is not working, of course).
      Stopping the wrong module helps to get the keyboard functional.
      ONE way (not the only) is to disable the wrong module in grub: Change the existing parameter line in grub, update-grub, reboot
      GRUB_CMDLINE_LINUX_DEFAULT="initcall_blacklist=elants_i2c"

    2. touchpad
      The „DesignWare“ Touchpad does NOT need module „i2c-hid" like many others.
      „DesignWare“ Touchpad needs module „i2c-hid-acpi“.
      How to do that?
      Hit-and-run solution:
      Invoke
      modprobe i2c-hid-acpi
      and see if it works

    ONE possible (persistent) solution of many is to create a systemd service.
    Other suggestions welcome!

    a) create
    /usr/local/bin/touchpad-kmodule.sh
    with +x for root
    content:
    #!/bin/bash
    modprobe i2c-hid-acpi

    b) create
    /etc/systemd/system/touchpadELAN.service
    access rights 644 for root
    content:

    [Unit]
    Description=load missing kernel module for touchpad

    [Service]
    ExecStart=/usr/local/bin/touchpad-kmodule.sh
    Type=oneshot
    RemainAfterExit=yes

    [Install]
    # WantedBy=multi-user.target
    WantedBy=default.target

    c) enable the serviced service
    sudo systemctl status touchpadELAN.service
    sudo systemctl enable touchpadELAN.service
    sudo systemctl start touchpadELAN.service


    Experience with some similar machines / similar problems, other solutions; try this solution with your laptop to see if it helps
    X) f$#@ing "tablet" disable (where applicable / in many similar Laptops):
    Blacklist the wrong module this way
    Create a file
    /etc/modprobe.d/blacklist-intel_vbtn.conf

    with content

    # bug in module breaks keyboard, so do not load it (askubuntu.com 127820)
    blacklist intel_vbtn




    every one complaining about wrong formatting: do a better job first and then KISS MY FEET!

    • 0