How to deactivate my Touchscreen? Thinkpad T440s with Ubuntu

Question

my Touchscreen is broken and I need to deactivate it, because it makes 'ghost clicks'. In several hours tried out every possible solution I found on Google - but nothing helped to deactivate it. Now I'm very lost. It would be awesome if you could help me out! What did I do wrong? Or what else shall I try out to deactivate the TouchScreen?

=> EDIT&ANSWERED The solution that worked for me has been described in this post. It's been the UDEV-rule for the USB-device <=

I did the following and all failed:

• xinput - deactivating
• xorg.conf.d entry - not loading drivers
• udev-rule
• deactivating hid_multitouch

Details about my computer: Thinkpad T440s with Ubuntu 21.10, 64-bit. Wayland Windowmanagment. Gnome 40.4.0. Drop me a message if you need to know more.

xinput:

WARNING: running xinput against an Xwayland server. See the xinput man page for details.
⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ xwayland-pointer:17                       id=6    [slave  pointer  (2)]
⎜   ↳ xwayland-relative-pointer:17              id=7    [slave  pointer  (2)]
⎜   ↳ xwayland-touch:17                         id=9    [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ xwayland-keyboard:17                      id=8    [slave  keyboard (3)]

I do not know, whether ID 9 is the TouchPad or TouchScreen. Deactivating did not help.

I tried xorg.conf.d as well. I did it in steps, but in the end I tried the maximum: I edited every config-file in /usr/share/X11/xorg.conf.d/ and changed to MatchIsTouchscreen "off" per TouchScreen and added Option "Ignore" "on". Furthermore I created a new file: /usr/share/X11/xorg.conf.d/98-disabletouch.conf

# from file Nr. 40
Section "InputClass"
        Identifier "libinput touchscreen catchall"
        MatchIsTouchscreen "off"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
        Option "Ignore" "on"
EndSection
from file Nr. 70
Section "InputClass"
        Identifier "Wacom USB touchscreen class"
        MatchUSBID "056a:"
        MatchDevicePath "/dev/input/event"
        MatchIsTouchscreen "off"
        Driver "wacom"
        Option "Ignore" "on"
EndSection
Section "InputClass"
        Identifier "Wacom touchscreen class"
        MatchProduct "Wacom|WACOM|PTK-540WL|ISD-V4"
        MatchDevicePath "/dev/input/event*"
        MatchIsTouchscreen "off"
        Driver "wacom"
        Option "Ignore" "on"
EndSection
Dell Canvas 27 (touch part is an Advanced Silicon, pen part a Wacom)
Section "InputClass"
        Identifier "Dell Canvas 27 Touch"
        MatchUSBID "2575:0204"
        MatchDevicePath "/dev/input/event*"
        MatchIsTouchscreen "off"
        Driver "wacom"
        Option "Ignore" "on"
EndSection

As this did not work I copied the file to /etc/X11/xorg.conf.d/99-disabletouchscreen.conf as well.

File list: ls /usr/share/X11/xorg.conf.d/

10-amdgpu.conf  10-quirks.conf  10-radeon.conf  40-libinput.conf  70-wacom.conf  98-disabletouch.conf

Full of despair I also created a udev-rule in a new file: sudo gedit /etc/udev/rules.d/94-disabletouchscreen.conf

SUBSYSTEM=="usb", ATTRS{idVendor}=="04f3", ATTRS{idProduct}=="0224", ATTR{authorized}="0"

This is based on the following output for cat /proc/bus/input/devices

I: Bus=0003 Vendor=04f3 Product=0224 Version=0110
N: Name="ELAN Touchscreen"
P: Phys=usb-0000:00:1d.0-1.5/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.5/1-1.5:1.0/0003:04F3:0224.0001/input/input33
U: Uniq=
H: Handlers=mouse0 event5 
B: PROP=0
B: EV=1b
B: KEY=400 0 0 0 0 0
B: ABS=10000000003
B: MSC=10
I: Bus=0003 Vendor=04f3 Product=0224 Version=0110
N: Name="ELAN Touchscreen"
P: Phys=usb-0000:00:1d.0-1.5/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.5/1-1.5:1.0/0003:04F3:0224.0001/input/input34
U: Uniq=
H: Handlers=event6 
B: PROP=0
B: EV=9
B: ABS=10000000000
I: Bus=0003 Vendor=04f3 Product=0224 Version=0110
N: Name="ELAN Touchscreen"
P: Phys=usb-0000:00:1d.0-1.5/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.5/1-1.5:1.0/0003:04F3:0224.0001/input/input35
U: Uniq=
H: Handlers=event17 
B: PROP=0
B: EV=100001

Last but not least I tried to deactivate hid_multitouch. Output for: lsmod | grep touch

hid_multitouch         28672  0
hid                   135168  3 usbhid,hid_multitouch,hid_generic

Output for: modinfo hid_multitouch | head

filename:       /lib/modules/5.13.0-37-generic/kernel/drivers/hid/hid-multitouch.ko
license:        GPL
description:    HID multitouch panels
author:         Benjamin Tissoires <benjamin.tissoires@gmail.com>
author:         Stephane Chatty <chatty@enac.fr>
srcversion:     A626AE4AE4D9CF6F069DB68
alias:          hid:b*g0004v*p*
alias:          hid:b*g0002v*p*
alias:          hid:b*g*v000018D1p00005028
alias:          hid:b0003g0002v00001477p00001025

BUT: modprobe -r hid_multitouch had no effect like deactivating the Touchscreen (or Touchpad). Though afterwards the output for lsmod | grep touch was empty, of course. Because it did not work I did not deactivate hid_multitouch permanently.

Now I'm lost and in despair, because I did not find further google solutions after hours of trial and error. I do not want to replace the display/TouchScreen, because it really costs a lot. And the display is working very well, just the Touch Screen makes it almost impossible to work with the laptop.

Do you have an idea for anything else I can try? Or did I do something wrong? I would be very grateful for any advice!

All the best, Manuel

New info: I found the following - not sure whether this is supposed to be that way: ls -l /sys/bus/hid/drivers/hid-multitouch/ says:

lrwxrwxrwx 1 root root    0 Mär 27 19:04 0003:04F3:0224.0001 -> ../../../../devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.5/1-1.5:1.0/0003:04F3:0224.0001
--w------- 1 root root 4096 Mär 27 19:04 bind
lrwxrwxrwx 1 root root    0 Mär 27 19:04 module -> ../../../../module/hid_multitouch
--w------- 1 root root 4096 Mär 27 19:04 new_id
--w------- 1 root root 4096 Mär 27 19:03 uevent
--w------- 1 root root 4096 Mär 27 19:04 unbind

I was wondering about the first folder, because there is no further entry for any other device. ls lists the following content for the folder:

country  driver  hidraw  input  modalias  power  quirks  report_descriptor  subsystem  uevent

Not sure whether it's relevant, but FYI.