diff --git a/src/fenrir-package/commands/curr_line.py b/src/fenrir-package/commands/curr_line.py
index ff8bcefb..009b4f5f 100644
--- a/src/fenrir-package/commands/curr_line.py
+++ b/src/fenrir-package/commands/curr_line.py
@@ -5,7 +5,7 @@ class command():
         pass
     def run(self, environment):
         pass
-    def setCallback(self, callback)
+    def setCallback(self, callback):
         pass
     def shutdown(self):
         pass
diff --git a/src/fenrir-package/core/environment.py b/src/fenrir-package/core/environment.py
index b63dda05..b51e21df 100644
--- a/src/fenrir-package/core/environment.py
+++ b/src/fenrir-package/core/environment.py
@@ -8,11 +8,11 @@ from core import screenData
 from core import generalInformation
 
 environment = {
-'screenData' = screenData.screenData,
-'runtime' = runtime.runtime,
-'generalInformation' = generalInformation.generalInformation,
-'settings' = settings.settings,
-'bindings' = bindings.bindings,
-'soundIcons' = soundIcons.soundIcons,
-'autospeak' = ['speak_delta']
+'screenData': screenData.screenData,
+'runtime': runtime.runtime,
+'generalInformation': generalInformation.generalInformation,
+'settings': settings.settings,
+'bindings': bindings.bindings,
+'soundIcons': soundIcons.soundIcons,
+'autospeak': ['speak_delta']
 }
diff --git a/src/fenrir-package/fenrir.py b/src/fenrir-package/fenrir.py
index 9825a6de..f66237ef 100755
--- a/src/fenrir-package/fenrir.py
+++ b/src/fenrir-package/fenrir.py
@@ -39,7 +39,7 @@ class fenrir():
         self.threadHandleInput.start()
         self.threadCommandQueue.start()
         while(self.environment['generalInformation']['running']):
-            time.sleep(2)
+            time.sleep(0.2)
         self.shutdown()
 
     def handleInput(self):
diff --git a/src/fenrir-package/screen/linux.py b/src/fenrir-package/screen/linux.py
index 6a33a94e..bd3623bf 100644
--- a/src/fenrir-package/screen/linux.py
+++ b/src/fenrir-package/screen/linux.py
@@ -12,7 +12,7 @@ class screenManager():
     def analyzeScreen(self, environment):
         # read screen
         currTTY = open('/sys/devices/virtual/tty/tty0/active','r')
-        runtime['newTTY'] = currTTY.read()[3:-1]
+        environment['screenData']['newTTY'] = currTTY.read()[3:-1]
         currTTY.close() 
         
         try:
@@ -44,7 +44,7 @@ class screenManager():
         if environment['screenData']['oldContentBytes'] != environment['screenData']['newContentBytes']:
             if ((len(environment['screenData']['delta']) < 4) or environment['screenData']['oldTTY'] != environment['screenData']['newTTY']):
                 environment['runtime']['speechDriver'].cancel()
-            diff = difflib.ndiff(runtime['oldContentText'], environment['screenData']['newContentText'])
+            diff = difflib.ndiff(environment['screenData']['oldContentText'], environment['screenData']['newContentText'])
             environment['screenData']['delta'] = ''.join(x[2:] for x in diff if x.startswith('+ '))
             environment['runtime']['speechDriver'].speak(environment['screenData']['delta'])
 
diff --git a/src/fenrir-package/speech/espeak.py b/src/fenrir-package/speech/espeak.py
index 472d6eb5..2990f214 100644
--- a/src/fenrir-package/speech/espeak.py
+++ b/src/fenrir-package/speech/espeak.py
@@ -27,7 +27,7 @@ class speech():
         self._es.cancel()
         return True
 
-    def setCallback(self, callback)
+    def setCallback(self, callback):
         pass
 
     def clear_buffer(self):
diff --git a/src/fenrir-package/speech/speechd.py b/src/fenrir-package/speech/speechd.py
index 9e8417a6..b04ae748 100644
--- a/src/fenrir-package/speech/speechd.py
+++ b/src/fenrir-package/speech/speechd.py
@@ -27,7 +27,7 @@ class speech():
         self._sd.cancel()
         return True
 
-    def setCallback(self, callback)
+    def setCallback(self, callback):
         pass
     
     def clear_buffer(self):
@@ -71,7 +71,10 @@ class speech():
         except:
             return False
 
-
     def shutdown(self):
+        if not self._isInitialized:
+            return False
+        self._isInitialized = False
         self.cancel()
         self._sd.close()
+        return True
diff --git a/src/fenrir-package/utils/debug.py b/src/fenrir-package/utils/debug.py
index 88b767d1..3c10202a 100644
--- a/src/fenrir-package/utils/debug.py
+++ b/src/fenrir-package/utils/debug.py
@@ -1,7 +1,8 @@
 #!/usr/bin/python
-
 # Debugger module for the Fenrir screen reader.
 
+from enum import Enum
+
 class debugLevel(Enum):
     DEACTIVE = 0
     ERROR = 1
@@ -31,9 +32,9 @@ class debug():
         else:
             if not self._fileOpened:
                 self.openDebugFile()
-            self.writeLog(environment, text, level):
+            self.writeLog(environment, text, level)
 
-    def writeLog(self, environment, text, level:
+    def writeLog(self, environment, text, level = debugLevel.DEACTIVE):
         if envirionment['settings']['debugLevel'] < level:
             return False
         if not self._fileOpened:
@@ -54,7 +55,7 @@ class debug():
     def setDebugFile(self, fileName):
         self.closeDebugFile()
         if self._fileOpened:
-           self.openDebugFile(self, fileName):
+           self.openDebugFile(self, fileName)