diff --git a/start.sh b/start.sh
index 8e7df30..65ca2fb 100644
--- a/start.sh
+++ b/start.sh
@@ -23,52 +23,44 @@ cd /home/unitree/robot_face_rec || {
   echo "Env before display detection: DISPLAY=$DISPLAY, XAUTHORITY=$XAUTHORITY"
 } >> "$LOG_FILE"
 
-# --- DISPLAY 设置逻辑 ---
-# 使用默认DISPLAY值:0，这是Linux系统中最常见的显示编号
-display_found=":0"
-echo "Using default DISPLAY: :0"
+# --- DISPLAY 和 XAUTHORITY 设置逻辑 ---
 
-for pid in $(pgrep Xorg); do
-  if [ -r /proc/$pid/environ ]; then
-    disp=$(tr '\0' '\n' < /proc/$pid/environ | grep '^DISPLAY=' | cut -d'=' -f2-)
-    if [ -n "$disp" ]; then
-      display_found="$disp"
-      echo "Chosen DISPLAY from Xorg process: $disp"
-      break
-    fi
-  fi
-done
+# 设置DISPLAY环境变量
+# 使用Linux系统最常见的默认值:0
+export DISPLAY=":0"
+echo "Using DISPLAY: $DISPLAY"
 
-# 如果还没找到 DISPLAY，则尝试 fallback
-if [ -z "$display_found" ]; then
-  # 常见默认：:0
-  display_found=":0"
-  echo "Chosen default DISPLAY: :0"
-fi
-
-export DISPLAY="$display_found"
-
-# 从Xorg命令行参数中获取正确的XAUTHORITY路径
+# 设置XAUTHORITY环境变量
+# 先尝试从Xorg进程命令行获取
 xauth_path=""
 for pid in $(pgrep Xorg); do
   if [ -r /proc/$pid/cmdline ]; then
     cmdline=$(tr '\0' ' ' < /proc/$pid/cmdline)
-    xauth_path=$(echo "$cmdline" | grep -o "-auth [^ ]*" | cut -d' ' -f2)
+    # 使用更兼容的方式提取auth参数
+    xauth_path=$(echo "$cmdline" | awk '/-auth/{print $2}' | head -1)
     if [ -n "$xauth_path" ]; then
       break
     fi
   fi
 done
 
-# 如果没有找到，使用默认路径
+# 如果没有找到，检查常见的XAUTHORITY路径
 if [ -z "$xauth_path" ]; then
-  xauth_path="/home/unitree/.Xauthority"
-  # 尝试更常见的gdm路径
+  # 检查gdm路径
   if [ -f "/run/user/1000/gdm/Xauthority" ]; then
     xauth_path="/run/user/1000/gdm/Xauthority"
+  # 检查lightdm路径
+  elif [ -f "/var/run/lightdm/root/:0" ]; then
+    xauth_path="/var/run/lightdm/root/:0"
+  # 默认路径
+  else
+    xauth_path="/home/unitree/.Xauthority"
   fi
 fi
 
+export XAUTHORITY="$xauth_path"
+echo "Using XAUTHORITY: $XAUTHORITY"
+
 export XAUTHORITY="$xauth_path"
 
 {