Toggling laptop touchsreen on Wayland

Back when I was still on X11 ¹ , I had this little bash script to toggle my touchscreen on/off, since I didn’t use it all that often except to sign the occasional PDF. And it sucked up power².

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#!/usr/bin/bash

# toggles touchscreen on x11-based systems

isOn="$(xinput --list-props 'SYNA2393:00 06CB:19AC' | grep 'Device Enabled')"
isOn="${isOn: -1}"

if [ $isOn -eq 0 ]; then
    xinput set-prop 'SYNA2393:00 06CB:19AC' 'Device Enabled' 1
    echo "Turning touchscreen on!"
else
    xinput set-prop 'SYNA2393:00 06CB:19AC' 'Device Enabled' 0
    echo "Turning Touchscreen off!"
fi

Unfortunately it doesn’t work on Wayland and there isn’t a great drop-in replacement for xinput on Wayland; you would either have to mess with udev or use this little script I cooked up:

Find your device ID. You can do this with libinput --list-devices or just cat /proc/bus/input/devices and look through the output for the touchscreen. For me (I have a 2018 Matebook X Pro) it’s 0018:06CB:19AC.0001.

Example output from cat /proc/bus/input/devices

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...
B: MSC=10

I: Bus=0018 Vendor=06cb Product=19ac Version=0100
N: Name="SYNA2393:00 06CB:19AC"
P: Phys=i2c-SYNA2393:00
S: Sysfs=/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-6/i2c-SYNA2393:00/0018:06CB:19AC.0001/input/input14
U: Uniq=
H: Handlers=event8 mouse0
B: PROP=2
...

Run these commands

Disabling the device:

sudo sh -c "echo '0018:06CB:19AC.0001' > /sys/bus/hid/drivers/hid-multitouch/unbind"

Enabling the device:

sudo sh -c "echo '0018:06CB:19AC.0001' > /sys/bus/hid/drivers/hid-multitouch/bind"

Alternatively, make a script to toggle it

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#!/usr/bin/bash
if [ -d "/sys/bus/hid/drivers/hid-multitouch/0018:06CB:19AC.0001" ]; then
  sudo sh -c "echo '0018:06CB:19AC.0001' > /sys/bus/hid/drivers/hid-multitouch/unbind"
  echo "Turning touchscreen off!"
else
  sudo sh -c "echo '0018:06CB:19AC.0001' > /sys/bus/hid/drivers/hid-multitouch/bind"
  echo "Turning Touchscreen on!"
fi

This script should work for toggling other input devices as well! I have these commands alias‘ed in ~/.zshrc
source for how to unbind devices

i.e. before I got an external monitor with a DPI vastly different from that of my laptop’s… ↩︎
I’m actually not 100% sure if this will cut power to the device but I hope it does? Probably worthwhile testing. But it does disable it. ↩︎

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