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mikel dorronsoro
Asked: 2020-06-12 08:38:00 +0800 CST

lenovo IdeaPad-3-14ARE05 Touchpad not working. Ubuntu 20.04

  • 772
I: Bus=0018 Vendor=0000 Product=0000 Version=0000
N: Name="Elan Touchscreen"
P: Phys=
S: Sysfs=/devices/platform/AMDI0010:01/i2c-1/i2c-ELAN0001:00/input/input4
U: Uniq=
H: Handlers=mouse0 event4 
B: PROP=2
B: EV=b
B: KEY=400 0 0 0 0 0
B: ABS=661800001000003
lenovo touchpad ideapad

4 Answers

  1. If you use kernel 5.8 or newer your can try:

    1. Open terminal
    2. Login with root (on debian su -l, on Ubuntu sudo su)
    3. Edit file /etc/default/grub
    4. Replace line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" with GRUB_CMDLINE_LINUX_DEFAULT="pci=nocrs quiet splash"
    5. Save file /etc/default/grub
    6. Execute update-grub
    7. Reboot

    This has been tested on Debian bullseye and Ubuntu Focal on Ideapad 3 15iil30.
    With bullseye on an ideapad 3, everything is functional, mouse, touchpad, video, sound, webcam, bluetouth, etc.

    • 6

  2. As I cannot say this is a duplicate of this question:

    I will add the answer of @theunreal89 here for future reference. (I don't think good answers should be in the comments)

    It seems not to be possible to blacklist elants_i2c driver, as it is a built-in kernel module for Ubuntu:

    stefano@stefano-IdeaPad-5-15ARE05:~$ modinfo elants-i2c
name:           elants_i2c
filename:       (builtin)
license:        GPL
description:    Elan I2c Touchscreen driver
author:         Scott Liu <[email protected]>

    so there is a faster way than compiling the kernel. Just create a SystemD unit like the below:

    stefano@stefano-IdeaPad-5-15ARE05:~$ cat /etc/systemd/system/touchpadfix.service 
[Unit]
Description=Fix touchpad issue by binding correct driver

[Service]
ExecStart=/usr/local/bin/touchpadfix
Type=oneshot
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

    and create /usr/local/bin/touchpadfix file as follows

    stefano@stefano-IdeaPad-5-15ARE05:~$ cat  /usr/local/bin/touchpadfix
#!/bin/bash
modprobe i2c_hid
echo "i2c-ELAN0001:00" > /sys/bus/i2c/drivers/elants_i2c/unbind
echo "i2c-ELAN0001:00" > /sys/bus/i2c/drivers/i2c_hid/bind

    and then make it executable, enable and start the unit with the following commands:

    chmod +x /usr/local/bin/touchpadfix
sudo systemctl daemon-reload
sudo systemctl enable --now touchpadfix.service

    and touchpad should start to work immediately!

    SOURCE: IdeaPad 5 15are05 - elan touchpad not working on 20.04 nor on 18.04 and https://wiki.archlinux.org/index.php/Lenovo_IdeaPad_5_15are0 which is giving us unbind-bind fix and dl3it user on this post https://bugzilla.kernel.org/show_bug.cgi?id=207759#c17

    • 2

  3. Upgrade OS to version 21.04 solves this problem.

    • 0

  4. Upgrading did not solely fix the issue on this IdeaPad 3. Following the first step worked after upgrade and running on kernel 5.11.0-37-generic

    Edit the file /etc/default/grub as root, e.g.

    sudoedit /etc/default/grub

    Replace the line

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

    with

    GRUB_CMDLINE_LINUX_DEFAULT="pci=nocrs quiet splash"

    Save the file and exit.

    Execute

    sudo update-grub

    Reboot

    • 0