diff --git a/src-tauri/src/core/core.rs b/src-tauri/src/core/core.rs
index da07422..9583b86 100644
--- a/src-tauri/src/core/core.rs
+++ b/src-tauri/src/core/core.rs
@@ -184,7 +184,7 @@ impl CoreManager {
                 if global_sub_pixels.len() >= total_colors_count * 3 {
                     let mut colors = vec![];
                     for index in 0..global_sub_pixels.len() {
-                        colors.push(*global_sub_pixels.get(&index).unwrap());
+                        colors.push(*global_sub_pixels.get(&index).unwrap_or(&100));
                     }
                     // info!("{:?}", colors);
                     global_sub_pixels = HashMap::new();
diff --git a/src-tauri/src/display/manager.rs b/src-tauri/src/display/manager.rs
index 39a776d..724da4e 100644
--- a/src-tauri/src/display/manager.rs
+++ b/src-tauri/src/display/manager.rs
@@ -1,5 +1,5 @@
 use ddc_hi::Display;
-use paris::{info, error};
+use paris::{error, info};
 use tokio::sync::{broadcast, OnceCell};
 
 use crate::{display::Brightness, rpc};
@@ -26,9 +26,11 @@ impl Manager {
     }
 
     pub async fn subscribe_display_brightness(mut rx: broadcast::Receiver<DisplayBrightness>) {
-        while let Ok(display_brightness) = rx.recv().await {
-            if let Err(err) = Self::set_display_brightness(display_brightness) {
-                error!("set_display_brightness failed. {:?}", err);
+        loop {
+            if let Ok(display_brightness) = rx.recv().await {
+                if let Err(err) = Self::set_display_brightness(display_brightness) {
+                    error!("set_display_brightness failed. {:?}", err);
+                }
             }
         }
     }
diff --git a/src-tauri/src/rpc/mqtt.rs b/src-tauri/src/rpc/mqtt.rs
index eeadc5b..2da0940 100644
--- a/src-tauri/src/rpc/mqtt.rs
+++ b/src-tauri/src/rpc/mqtt.rs
@@ -2,13 +2,12 @@ use crate::display;
 use image::EncodableLayout;
 use paris::warn;
 use rumqttc::{AsyncClient, Event, Incoming, MqttOptions, QoS};
-use serde::Deserialize;
 use std::time::Duration;
 use time::{format_description, OffsetDateTime};
 use tokio::{sync::broadcast, task};
 
 const DISPLAY_TOPIC: &'static str = "display-ambient-light/display";
-const DISPLAY_BRIGHTNESS_TOPIC: &'static str = "display-ambient-light/display/brightness";
+const DISPLAY_BRIGHTNESS_TOPIC: &'static str = "display-ambient-light/board/brightness";
 
 pub struct MqttRpc {
     client: AsyncClient,