diff --git a/libeplayer3/container/container_ass.c b/libeplayer3/container/container_ass.c
index ab0a7eb..c944b77 100644
--- a/libeplayer3/container/container_ass.c
+++ b/libeplayer3/container/container_ass.c
@@ -398,6 +398,8 @@ static void ASSThread(Context_t *context) {
             //       subtitel zeitpunkt zu bestimmen und solange zu schlafen.
 #ifdef MARTII
             usleep(10000);
+	    if(!context->playback->mayWriteToFramebuffer)
+		continue;
             getMutex(__LINE__);
 	    checkRegions();
 #else
@@ -561,7 +563,7 @@ static void ASSThread(Context_t *context) {
 
     ass_printf(10, "terminating\n");
 #ifdef MARTII
-pthread_exit(NULL);
+    pthread_exit(NULL);
 #endif
 }
 
diff --git a/libeplayer3/include/playback.h b/libeplayer3/include/playback.h
index a7fa6aa..95ff98d 100644
--- a/libeplayer3/include/playback.h
+++ b/libeplayer3/include/playback.h
@@ -3,7 +3,7 @@
 #include <sys/types.h>
 
 #ifdef MARTII
-typedef enum {PLAYBACK_OPEN, PLAYBACK_CLOSE, PLAYBACK_PLAY, PLAYBACK_STOP, PLAYBACK_PAUSE, PLAYBACK_CONTINUE, PLAYBACK_FLUSH, PLAYBACK_TERM, PLAYBACK_FASTFORWARD, PLAYBACK_SEEK, PLAYBACK_SEEK_ABS, PLAYBACK_PTS, PLAYBACK_LENGTH, PLAYBACK_SWITCH_AUDIO, PLAYBACK_SWITCH_SUBTITLE, PLAYBACK_INFO, PLAYBACK_SLOWMOTION, PLAYBACK_FASTBACKWARD, PLAYBACK_GET_FRAME_COUNT, PLAYBACK_SWITCH_TELETEXT, PLAYBACK_SWITCH_DVBSUBTITLE} PlaybackCmd_t;
+typedef enum {PLAYBACK_OPEN, PLAYBACK_CLOSE, PLAYBACK_PLAY, PLAYBACK_STOP, PLAYBACK_PAUSE, PLAYBACK_CONTINUE, PLAYBACK_FLUSH, PLAYBACK_TERM, PLAYBACK_FASTFORWARD, PLAYBACK_SEEK, PLAYBACK_SEEK_ABS, PLAYBACK_PTS, PLAYBACK_LENGTH, PLAYBACK_SWITCH_AUDIO, PLAYBACK_SWITCH_SUBTITLE, PLAYBACK_INFO, PLAYBACK_SLOWMOTION, PLAYBACK_FASTBACKWARD, PLAYBACK_GET_FRAME_COUNT, PLAYBACK_SWITCH_TELETEXT, PLAYBACK_SWITCH_DVBSUBTITLE, PLAYBACK_FRAMEBUFFER_LOCK, PLAYBACK_FRAMEBUFFER_UNLOCK} PlaybackCmd_t;
 #else
 typedef enum {PLAYBACK_OPEN, PLAYBACK_CLOSE, PLAYBACK_PLAY, PLAYBACK_STOP, PLAYBACK_PAUSE, PLAYBACK_CONTINUE, PLAYBACK_FLUSH, PLAYBACK_TERM, PLAYBACK_FASTFORWARD, PLAYBACK_SEEK, PLAYBACK_PTS, PLAYBACK_LENGTH, PLAYBACK_SWITCH_AUDIO, PLAYBACK_SWITCH_SUBTITLE, PLAYBACK_INFO, PLAYBACK_SLOWMOTION, PLAYBACK_FASTBACKWARD, PLAYBACK_GET_FRAME_COUNT} PlaybackCmd_t;
 #endif
@@ -34,6 +34,7 @@ typedef struct PlaybackHandler_s {
 #ifdef MARTII
     unsigned char isDvbSubtitle;
     unsigned char isTeletext;
+    unsigned char mayWriteToFramebuffer;
 #endif
 
     int (* Command) (/*Context_t*/void  *, PlaybackCmd_t, void *);
diff --git a/libeplayer3/output/output_subtitle.c b/libeplayer3/output/output_subtitle.c
index 6403a96..4bd6f8b 100644
--- a/libeplayer3/output/output_subtitle.c
+++ b/libeplayer3/output/output_subtitle.c
@@ -529,7 +529,7 @@ static int Write(void* _context, void *data) {
     int DataLength;
     unsigned long long int Pts;
     float Duration;
-    
+ 
     subtitle_printf(10, "\n");
 
     if (data == NULL)
diff --git a/libeplayer3/playback/playback.c b/libeplayer3/playback/playback.c
index 4963adb..43ad42f 100644
--- a/libeplayer3/playback/playback.c
+++ b/libeplayer3/playback/playback.c
@@ -1100,6 +1100,16 @@ static int Command(void* _context, PlaybackCmd_t command, void * argument) {
         ret = PlaybackSwitchTeletext(context, (int*)argument);
 	break;
     }
+    case PLAYBACK_FRAMEBUFFER_LOCK: {
+        context->playback->mayWriteToFramebuffer = 0;
+    	ret = cERR_PLAYBACK_NO_ERROR;
+	break;
+    }
+    case PLAYBACK_FRAMEBUFFER_UNLOCK: {
+        context->playback->mayWriteToFramebuffer = 1;
+    	ret = cERR_PLAYBACK_NO_ERROR;
+	break;
+    }
 #endif
     default:
         playback_err("PlaybackCmd %d not supported!\n", command);
@@ -1134,6 +1144,7 @@ PlaybackHandler_t PlaybackHandler = {
 #ifdef MARTII
     0,
     0,
+    1,
 #endif
     &Command,
     "",