hello，我最近写了一个脚本用于开机自动选择键盘，内容如下：

#!/bin/bash

# 笔记本默认键盘，通常均为该名
DEFAULT_KEYBOARD_DEV='AT Translated Set 2 keyboard'
# 外设键盘
PERIPHERAL_KEYBOARD_DEV='MIIIW MIIIW 2.4G Receiver Keyboard'
# 外设键盘简称
PERIPHERAL_KEYBOARD_FOR_SHORT='MIIIW ART series'

# 设置设备状态
function setStatus(){
  # 获取传入设备的id，设备id往往不止有一个
	IDS=`xinput list | grep "$2" | awk  -F 'id=' '{print $2}' | awk '{print $1}' `
  # 最终执行命令
	for elem in $IDS 
	do 
		xinput $1 $elem
	done
}

# 外设键盘是否插入
EXIST_PERIPHERAL_KEYBOARD=`xinput list | grep "$PERIPHERAL_KEYBOARD_DEV"`

# 判断该选择哪个键盘
if [ "" != "$EXIST_PERIPHERAL_KEYBOARD" ]
then
  # 若外设键盘存在，则关闭笔记本键盘，并开启外接键盘
	setStatus --disable $DEFAULT_KEYBOARD_DEV
	setStatus --enable $PERIPHERAL_KEYBOARD_DEV
  echo "已禁用默认键盘，启动\"$PERIPHERAL_KEYBOARD_FOR_SHORT\"键盘。"
else
  # 若外设键盘不存在，则开启笔记本键盘，并关闭外接键盘
	setStatus --enable $DEFAULT_KEYBOARD_DEV
	setStatus --disable $PERIPHERAL_KEYBOARD_DEV
  echo "未检测到外设键盘，启动默认键盘。"
fi

exit 0

同时，编写的systemd开机自启动服务keyboard.service内容如下：

[Unit]
Description=Auto select keyboard
After=graphical.target

[Service]
Type=simple
WorkingDirectory=/home/aaron/.dotfiles/system/
ExecStart=/home/aaron/.dotfiles/system/keyboard.sh
User=aaron
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

但是 当开机时，并不能成功运行。服务信息如下：

● keyboard.service - Auto select keyboard
     Loaded: loaded (/etc/systemd/system/keyboard.service; enabled; preset: enabled)
     Active: active (exited) since Sun 2024-03-31 02:17:13 CST; 11s ago
    Process: 26144 ExecStart=/home/aaron/.dotfiles/system/keyboard.sh (code=exited, status=0/SUCCESS)
   Main PID: 26144 (code=exited, status=0/SUCCESS)
        CPU: 18ms

3月 31 02:17:13 aaron-PC systemd[1]: Started keyboard.service - Auto select keyboard.
3月 31 02:17:13 aaron-PC keyboard.sh[26146]: Unable to connect to X server
3月 31 02:17:13 aaron-PC keyboard.sh[26150]: Unable to connect to X server
3月 31 02:17:13 aaron-PC keyboard.sh[26157]: Unable to connect to X server
3月 31 02:17:13 aaron-PC keyboard.sh[26144]: 未检测到外设键盘，启动默认键盘。

请问各位大佬知道什么原因吗？