A script to turn off the touchscreen on your Steam Deck while using Mod Organizer 2 so it doesn't crash to desktop

no-touch.sh

# version 1.1
# This is intended to turn off the Steam Deck's touchscreen in desktop mode when you launch Mod Organizer 2 as installed
# by modorganizer2-linux-installer (maybe SteamTinkerLaunch too).

# 1. download this file somewhere (like ~/bin/) and run `chmod u+x` on it
# 2. write the following line to sudoers to let this script turn the touchscreen off:
#    `EDITOR=nano sudo visudo /etc/sudoers.d/zz-nopasswd`
#    deck ALL=(ALL) NOPASSWD: /usr/bin/tee /sys/devices/platform/*/inhibited
#    This will be overwritten up SteamOS updates, breaking this fix until you repeat this step.
# 2.a. Make the sudoers change permanent:
#      `echo "/etc/sudoers.d/zz-nopasswd" >> /etc/atomic-update.conf.d/sudoers-nopasswd.conf`
# 3. update your Steam launch options to:
#        ~/bin/no-touch.sh ; %command% ; ~/bin/no-touch.sh reset
#    If you would put something else in launch options, it goes between the semicolons

[ "$1" = "reset" ] && RESET=true
[ -z "$KDE_FULL_SESSION" ] && GAMING=true

# in desktop mode, turn the touchscreen off when starting, on when done
# in gaming mode, force the touchscreen on when starting, in case of prior failure
if [ -z "$GAMING" ]; then
  [ -z "$RESET" ] && TOUCHOFF=true
  [ -n "$RESET" ] && TOUCHON=true
else
  [ -z "$RESET" ] && TOUCHON=true
fi

# Finds the sysfs input entry path by reading /proc/bus/input/devices directly
# This code wasn't written to disable multiple touchscreens
# Note: don't use existing tools to parse this file because libinput requires sudo to
# read this device. The /ABS=[0-9]{10}/ checks for a long number, meaning high bits set,
# meaning that of the two FTS3528 devices it's the touchscreen.
if [ -n "$TOUCHON" ] || [ -n "$TOUCHOFF" ]; then
  TOUCH_INPUT="$( cat /proc/bus/input/devices |
    awk 'BEGIN{RS="";FS="\n"} /N: Name="FTS3528/ && /B: ABS=[0-9]{10}/' |
    sed -n 's|S: Sysfs=\(.*\)|\1|p' )"
  [ -n "$TOUCH_INPUT" ] && INHIBITED="/sys$TOUCH_INPUT/inhibited"
  [ -n "$INHIBITED" ] && ( [ -n "$TOUCHON" ]; echo $? | sudo tee $INHIBITED >/dev/null )
fi