switch_monitor.sh

#!/bin/bash
# -b <integer>, bus or screen, run: ddcutil detect --verbose look for: I2C bus:  /dev/i2c-9, which will evaluate to: -b 9
# setvcp 0x60, select input control
# Select source
## 0x11 hdmi
## 0x0f displayport

#Reference: https://fostips.com/shortcut-key-switch-monitor-input-source-linux/

CHOSEN_SOURCE="$1"

if [[ "$CHOSEN_SOURCE" = "1" ]]; then
  ddcutil -b 9 setvcp 0x60 0x11
  ddcutil -b 10 setvcp 0x60 0x0f
  ddcutil -b 11 setvcp 0x60 0x0f
elif [[ "$CHOSEN_SOURCE" = "2" ]]; then
  ddcutil -b 9 setvcp 0x60 0x0f
  ddcutil -b 10 setvcp 0x60 0x11
  ddcutil -b 11 setvcp 0x60 0x11
else
 echo "Please pass in option 1 or 2 for primary or secondary"
fi