diff --git a/src/com/telnet.rs b/src/com/telnet.rs
index 9e0389f..79ad544 100644
--- a/src/com/telnet.rs
+++ b/src/com/telnet.rs
@@ -492,7 +492,8 @@ impl Com for ComTelnetImpl {
     }
 
     fn read_data(&mut self) -> TermComResult<Option<Vec<u8>>> {
-        let mut buf = [0; 1024 * 256];
+        let mut buf: [u8; 262144] = [0; 1024 * 256];
+        self.tcp_stream.set_nonblocking(true)?;
         match self.tcp_stream.read(&mut buf) {
             Ok(size) => {
                 if size == 0 {
diff --git a/src/ui/buffer_update_thread.rs b/src/ui/buffer_update_thread.rs
index 793a5d8..769ef39 100644
--- a/src/ui/buffer_update_thread.rs
+++ b/src/ui/buffer_update_thread.rs
@@ -68,7 +68,7 @@ impl BufferUpdateThread {
     fn update_buffer(&mut self, ctx: &egui::Context, buffer_parser: &mut dyn BufferParser, data: &[u8]) -> (u64, usize) {
         let has_data = !data.is_empty();
         if !data.is_empty() {
-            // println!("data : {} {}", self.last_update.elapsed().as_millis(), data.len());
+            println!("data : {} {}", data.len(), self.enabled);
         }
         if !self.enabled {
             return (10, 0);
diff --git a/src/ui/com_thread.rs b/src/ui/com_thread.rs
index dbc3fab..cabf415 100644
--- a/src/ui/com_thread.rs
+++ b/src/ui/com_thread.rs
@@ -42,7 +42,7 @@ impl ConnectionThreadData {
                 Ok(Some(data)) => {
                     if self.baud_rate == 0 {
                         if let Err(err) = self.tx.send(SendData::Data(data)) {
-                            log::error!("connection_thread::read_data: {err}");
+                            log::error!("connection_thread::read_data1: {err}");
                             self.thread_is_running &= self.tx.send(SendData::Disconnect).is_ok();
                         }
                     } else {
@@ -52,14 +52,14 @@ impl ConnectionThreadData {
                 Ok(None) => return false,
 
                 Err(err) => {
-                    log::error!("connection_thread::read_data: {err}");
+                    log::error!("connection_thread::read_data2: {err}");
                     self.disconnect();
                     return false;
                 }
             }
         } else if self.baud_rate == 0 {
             if let Err(err) = self.tx.send(SendData::Data(self.data_buffer.drain(..).collect())) {
-                log::error!("connection_thread::read_data: {err}");
+                log::error!("connection_thread::read_data3: {err}");
                 self.thread_is_running &= self.tx.send(SendData::Disconnect).is_ok();
                 self.disconnect();
             }