--- lbbs/src/screen.c	2025/05/11 11:33:44	1.45
+++ lbbs/src/screen.c	2025/05/15 05:14:57	1.49
@@ -98,7 +98,7 @@ void set_input_echo(int echo)
 		prints("\xff\xfb\x01\xff\xfb\x03");
 		iflush();
 		igetch(0);
-		igetch(1);
+		igetch_reset();
 	}
 }
 
@@ -112,11 +112,15 @@ static int _str_input(char *buffer, int
 	for (offset = 0; offset < buf_size - 1 && buffer[offset] != '\0'; offset++)
 		;
 
-	while (!SYS_server_exit && (c = igetch_t(MIN(MAX_DELAY_TIME, 60))))
+	igetch_reset();
+
+	while (!SYS_server_exit)
 	{
+		c = igetch_t(MIN(MAX_DELAY_TIME, 60));
+
 		if (c == CR)
 		{
-			igetch(1); // Cleanup remaining '\n' in the buffer
+			igetch_reset();
 			break;
 		}
 		else if (c == KEY_TIMEOUT || c == KEY_NULL) // timeout or broken pipe
@@ -156,7 +160,7 @@ static int _str_input(char *buffer, int
 		{
 			if (!hz && offset + 2 > buf_size - 1) // No enough space for Chinese character
 			{
-				igetch(1); // Cleanup remaining input
+				igetch(0); // Ignore 1 character
 				outc('\a');
 				iflush();
 				continue;
@@ -210,8 +214,6 @@ int get_data(int row, int col, char *pro
 {
 	int len;
 
-	igetch(1); // Cleanup input buffer
-
 	moveto(row, col);
 	prints(prompt);
 	prints(buffer);
@@ -319,6 +321,7 @@ int display_file_ex(const char *filename
 				input_ok = 1;
 				switch (ch)
 				{
+				case KEY_NULL:
 				case KEY_TIMEOUT:
 					goto cleanup;
 				case KEY_UP:
@@ -332,8 +335,9 @@ int display_file_ex(const char *filename
 					// prints("\033[T"); // Scroll down 1 line
 					max_lines = screen_rows - 1; // Legacy Fterm only works with this line
 					break;
-				case KEY_DOWN:
 				case CR:
+					igetch_reset();
+				case KEY_DOWN:
 					if (c_line_current + ((screen_rows - 2) - (line - 1)) >= c_line_total) // Reach bottom
 					{
 						break;