KVM via USB Switch on Fedora 32

display-switch.sh

#!/usr/bin/zsh

usb_device="046d:c332"
display_output="HDMI-0"

while true
do
    if lsusb | grep $usb_device > /dev/null 2>&1
    then
        if xrandr --listactivemonitors | grep "Monitors: 0" > /dev/null 2>&1
        then 
            xrandr --output $display_output --auto
        fi
    else
        if xrandr --listactivemonitors | grep "+*"$display_output > /dev/null 2>&1
        then
            xrandr --output $display_output --off
        fi
    fi
    sleep 1s
done