diff --git a/controldeck.py b/controldeck.py
index df4153c..ed13a42 100755
--- a/controldeck.py
+++ b/controldeck.py
@@ -300,7 +300,11 @@ class Volume(Div):
       volume_level = 0
       if self.pa_state:  # might be empty {} if it is not found
         # pulseaudio 2^16 (65536) volume levels
-        volume_level = float(self.pa_state['volume']['front-left']['value_percent'][:-1])  # remove the % sign
+        if 'front-left' in self.pa_state['volume']:
+          volume_level = float(self.pa_state['volume']['front-left']['value_percent'][:-1])  # remove the % sign
+        elif 'mono' in self.pa_state['volume']:
+          volume_level = float(self.pa_state['volume']['mono']['value_percent'][:-1])  # remove the % sign
+        # TODO: ? indicator if stream is stereo or mono ?
 
       badge = QBadge(
         text=badge_name,
diff --git a/data/controldeck.service.local b/data/controldeck.service.local
index 57a6b82..f9d2d71 100644
--- a/data/controldeck.service.local
+++ b/data/controldeck.service.local
@@ -6,7 +6,7 @@ After=network.target
 [Service]
 Environment=PYTHONUNBUFFERED=1
 TimeoutStartSec=30
-ExecStartPre=/bin/sh -c 'source /etc/profile'
+#ExecStartPre=/bin/sh -c 'source /etc/profile'
 ExecStart=%h/.local/bin/controldeck -D
 Restart=on-failure
 RestartSec=4