diff --git a/XOutput/Devices/AbstractInputHelper.cs b/XOutput/Devices/AbstractInputHelper.cs
index 107e7f15..f4f50d35 100644
--- a/XOutput/Devices/AbstractInputHelper.cs
+++ b/XOutput/Devices/AbstractInputHelper.cs
@@ -31,7 +31,7 @@ public AbstractInputHelper()
             {
                 throw new ArgumentException("Type must be enum", nameof(T));
             }
-            values = (T[])Enum.GetValues(typeof(T));
+            values = ((T[])Enum.GetValues(typeof(T))).Distinct();
             buttons = values.Where(v => IsButton(v)).ToArray();
             axes = values.Where(v => IsAxis(v)).ToArray();
             dPad = values.Where(v => IsDPad(v)).ToArray();
diff --git a/XOutput/Devices/DeviceInputChangedEventArgs.cs b/XOutput/Devices/DeviceInputChangedEventArgs.cs
index 66689da9..e9d39693 100644
--- a/XOutput/Devices/DeviceInputChangedEventArgs.cs
+++ b/XOutput/Devices/DeviceInputChangedEventArgs.cs
@@ -10,6 +10,26 @@ namespace XOutput.Devices
 
     public class DeviceInputChangedEventArgs : EventArgs
     {
+        public IEnumerable<Enum> ChangedValues => changedValues.ToArray();
+        public IEnumerable<int> ChangedDPads => changedDPads.ToArray();
 
+        protected IEnumerable<Enum> changedValues;
+        protected IEnumerable<int> changedDPads;
+
+        public DeviceInputChangedEventArgs(IEnumerable<Enum> changedValues, IEnumerable<int> changedDPads)
+        {
+            this.changedDPads = changedDPads;
+            this.changedValues = changedValues;
+        }
+
+        public bool HasValueChanged(Enum type)
+        {
+            return changedValues.Contains(type);
+        }
+
+        public bool HasDPadChanged(int dPadIndex)
+        {
+            return changedDPads.Contains(dPadIndex);
+        }
     }
 }
diff --git a/XOutput/Devices/DeviceState.cs b/XOutput/Devices/DeviceState.cs
new file mode 100644
index 00000000..485d79f8
--- /dev/null
+++ b/XOutput/Devices/DeviceState.cs
@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace XOutput.Devices
+{
+    public class DeviceState
+    {
+        public Dictionary<Enum, double> Values => values;
+        public IEnumerable<DPadDirection> DPads => dPads;
+        protected Dictionary<Enum, double> values = new Dictionary<Enum, double>();
+        protected DPadDirection[] dPads;
+
+        public DeviceState(IEnumerable<Enum> types, int dPadCount)
+        {
+            foreach (Enum type in types)
+            {
+                values.Add(type, 0);
+            }
+            dPads = new DPadDirection[dPadCount];
+        }
+
+        public IEnumerable<int> SetDPads(IEnumerable<DPadDirection> newDPads)
+        {
+            if (newDPads.Count() != dPads.Length)
+                throw new ArgumentException();
+            ICollection<int> changed = new HashSet<int>();
+            foreach (var x in newDPads.Select((d, i) => new { New = d, Old = dPads[i], Index = i }).ToArray())
+            {
+                if (x.New != x.Old)
+                {
+                    dPads[x.Index] = x.New;
+                    changed.Add(x.Index);
+                }
+            }
+            return changed;
+        }
+
+        public IEnumerable<Enum> SetValues(Dictionary<Enum, double> newValues)
+        {
+            ICollection<Enum> changed = new HashSet<Enum>();
+            foreach (var x in newValues.Select((d, i) => new { New = d.Value, Old = values[d.Key], Type = d.Key }).ToArray())
+            {
+                if (x.New != x.Old)
+                {
+                    values[x.Type] = x.New;
+                    changed.Add(x.Type);
+                }
+            }
+            return changed;
+        }
+    }
+}
diff --git a/XOutput/Devices/Input/DirectInput/DirectDevice.cs b/XOutput/Devices/Input/DirectInput/DirectDevice.cs
index 3147457b..7468c234 100644
--- a/XOutput/Devices/Input/DirectInput/DirectDevice.cs
+++ b/XOutput/Devices/Input/DirectInput/DirectDevice.cs
@@ -53,6 +53,8 @@ public bool Connected
         private readonly Enum[] axes;
         private readonly Enum[] sliders;
         private readonly DPadDirection[] dpads;
+        private readonly Enum[] allTypes;
+        private readonly DeviceState state;
         private readonly EffectInfo force;
         private readonly Dictionary<DeviceObjectInstance, Effect> actuators;
         private bool connected = false;
@@ -96,6 +98,8 @@ public DirectDevice(DeviceInstance deviceInstance, Joystick joystick)
             {
                 actuators = new Dictionary<DeviceObjectInstance, Effect>();
             }
+            allTypes = buttons.Concat(axes).Concat(sliders).ToArray();
+            state = new DeviceState(allTypes, dpads.Length);
             inputRefresher = new Thread(InputRefresher);
             inputRefresher.Name = ToString() + " input reader";
             inputRefresher.SetApartmentState(ApartmentState.STA);
@@ -223,11 +227,12 @@ public bool RefreshInput()
                 try
                 {
                     joystick.Poll();
-                    foreach (var dpad in Enumerable.Range(0, dpads.Length))
-                    {
-                        dpads[dpad] = GetDPadValue(dpad);
-                    }
-                    InputChanged?.Invoke(this, new DeviceInputChangedEventArgs());
+                    var newDPads = Enumerable.Range(0, dpads.Length).Select(i => GetDPadValue(i));
+                    var newValues = allTypes.ToDictionary(t => t, t => Get(t));
+                    var changedDPads = state.SetDPads(newDPads);
+                    var changedValues = state.SetValues(newValues);
+                    if (changedDPads.Any() || changedValues.Any())
+                        InputChanged?.Invoke(this, new DeviceInputChangedEventArgs(changedValues, changedDPads));
                     return true;
                 }
                 catch
diff --git a/XOutput/Devices/Input/Keyboard/Keyboard.cs b/XOutput/Devices/Input/Keyboard/Keyboard.cs
index d2edd429..0cbb1f3f 100644
--- a/XOutput/Devices/Input/Keyboard/Keyboard.cs
+++ b/XOutput/Devices/Input/Keyboard/Keyboard.cs
@@ -29,10 +29,12 @@ public event DeviceDisconnectedHandler Disconnected { add { } remove { } }
 
         private Thread inputRefresher;
         private readonly Enum[] buttons;
+        private readonly DeviceState state;
 
         public Keyboard()
         {
             buttons = KeyboardInputHelper.Instance.Buttons.Where(x => x != Key.None).OrderBy(x => x.ToString()).OfType<Enum>().ToArray();
+            state = new DeviceState(buttons, 0);
             inputRefresher = new Thread(InputRefresher);
             inputRefresher.Name = "Keyboard input notification";
             inputRefresher.SetApartmentState(ApartmentState.STA);
@@ -79,7 +81,10 @@ private void InputRefresher()
             {
                 while (true)
                 {
-                    InputChanged?.Invoke(this, new DeviceInputChangedEventArgs());
+                    var newValues = buttons.ToDictionary(t => t, t => Get(t));
+                    var changedValues = state.SetValues(newValues);
+                    if (changedValues.Any())
+                        InputChanged?.Invoke(this, new DeviceInputChangedEventArgs(changedValues, new int[0]));
                     Thread.Sleep(1);
                 }
             }
diff --git a/XOutput/Devices/XInput/XInputHelper.cs b/XOutput/Devices/XInput/XInputHelper.cs
index b2f4a103..8d934af4 100644
--- a/XOutput/Devices/XInput/XInputHelper.cs
+++ b/XOutput/Devices/XInput/XInputHelper.cs
@@ -97,6 +97,11 @@ public static bool IsDPad(this XInputTypes input)
             return XInputHelper.Instance.IsDPad(input);
         }
 
+        public static bool IsButton(this XInputTypes input)
+        {
+            return XInputHelper.Instance.IsButton(input);
+        }
+
         public static double GetDisableValue(this XInputTypes input)
         {
             return XInputHelper.Instance.GetDisableValue(input);
diff --git a/XOutput/Devices/XInput/XOutputDevice.cs b/XOutput/Devices/XInput/XOutputDevice.cs
index e526d1de..e482c499 100644
--- a/XOutput/Devices/XInput/XOutputDevice.cs
+++ b/XOutput/Devices/XInput/XOutputDevice.cs
@@ -13,6 +13,8 @@ namespace XOutput.Devices.XInput
     /// </summary>
     public sealed class XOutputDevice : IDevice
     {
+        public const int DPadCount = 1;
+
         /// <summary>
         /// This event is invoked if the data from the device was updated
         /// </summary>
@@ -26,7 +28,8 @@ public sealed class XOutputDevice : IDevice
         private readonly Dictionary<XInputTypes, double> values = new Dictionary<XInputTypes, double>();
         private readonly IInputDevice source;
         private readonly InputMapperBase mapper;
-        private DPadDirection[] dPads = new DPadDirection[1];
+        private readonly DPadDirection[] dPads = new DPadDirection[DPadCount];
+        private readonly DeviceState state;
 
         /// <summary>
         /// Creates a new XDevice.
@@ -37,6 +40,7 @@ public XOutputDevice(IInputDevice source, Mapper.InputMapperBase mapper)
         {
             this.source = source;
             this.mapper = mapper;
+            state = new DeviceState(XInputHelper.Instance.Values.OfType<Enum>().ToArray(), DPadCount);
             source.InputChanged += SourceInputChanged;
         }
 
@@ -94,7 +98,10 @@ public bool RefreshInput()
             {
                 dPads[0] = DPadHelper.GetDirection(GetBool(XInputTypes.UP), GetBool(XInputTypes.DOWN), GetBool(XInputTypes.LEFT), GetBool(XInputTypes.RIGHT));
             }
-            InputChanged?.Invoke(this, new DeviceInputChangedEventArgs());
+            var changedDPads = state.SetDPads(dPads);
+            var changedValues = state.SetValues(values.Where(t => !t.Key.IsDPad()).ToDictionary(x => (Enum)x.Key, x => x.Value));
+            if (changedDPads.Any() || changedValues.Any())
+                InputChanged?.Invoke(this, new DeviceInputChangedEventArgs(changedValues, changedDPads));
             return true;
         }
 
diff --git a/XOutput/UI/Component/ControllerModel.cs b/XOutput/UI/Component/ControllerModel.cs
index 3b8a9ab6..57c1847d 100644
--- a/XOutput/UI/Component/ControllerModel.cs
+++ b/XOutput/UI/Component/ControllerModel.cs
@@ -3,6 +3,7 @@
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Windows.Media;
 using XOutput.Devices;
 
 namespace XOutput.UI.Component
@@ -63,6 +64,20 @@ public bool CanStart
                 }
             }
         }
+
+        private Brush background;
+        public Brush Background
+        {
+            get => background;
+            set
+            {
+                if (background != value)
+                {
+                    background = value;
+                    OnPropertyChanged(nameof(Background));
+                }
+            }
+        }
         public string DisplayName { get { return Controller.ToString(); } }
     }
 }
diff --git a/XOutput/UI/Component/ControllerView.xaml b/XOutput/UI/Component/ControllerView.xaml
index e4152da5..7214e513 100644
--- a/XOutput/UI/Component/ControllerView.xaml
+++ b/XOutput/UI/Component/ControllerView.xaml
@@ -7,7 +7,7 @@
              d:DataContext="{d:DesignInstance Type=local:ControllerViewModel, IsDesignTimeCreatable=False}"
              mc:Ignorable="d" 
              d:DesignHeight="50" d:DesignWidth="300">
-    <Grid>
+    <Grid Background="{Binding Model.Background}">
         <Grid.ColumnDefinitions>
             <ColumnDefinition Width="*"/>
             <ColumnDefinition Width="100"/>
diff --git a/XOutput/UI/Component/ControllerViewModel.cs b/XOutput/UI/Component/ControllerViewModel.cs
index dc1c5050..af48163e 100644
--- a/XOutput/UI/Component/ControllerViewModel.cs
+++ b/XOutput/UI/Component/ControllerViewModel.cs
@@ -4,20 +4,28 @@
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Windows.Media;
+using System.Windows.Threading;
 using XOutput.Devices;
 using XOutput.UI.Windows;
 
 namespace XOutput.UI.Component
 {
-    public class ControllerViewModel : ViewModelBase<ControllerModel>
+    public class ControllerViewModel : ViewModelBase<ControllerModel>, IDisposable
     {
+        private const int BackgroundDelayMS = 500;
         private readonly Action<string> log;
+        private readonly DispatcherTimer timer = new DispatcherTimer();
 
         public ControllerViewModel(ControllerModel model, GameController controller, Action<string> log) : base(model)
         {
             this.log = log;
             Model.Controller = controller;
             Model.ButtonText = "Start";
+            Model.Background = Brushes.White;
+            Model.Controller.InputDevice.InputChanged += InputDevice_InputChanged;
+            timer.Interval = TimeSpan.FromMilliseconds(BackgroundDelayMS);
+            timer.Tick += Timer_Tick;
         }
 
         public void Edit()
@@ -57,5 +65,23 @@ public void Start()
                 Model.Started = controllerCount != 0;
             }
         }
+
+        public void Dispose()
+        {
+            timer.Tick -= Timer_Tick;
+            Model.Controller.InputDevice.InputChanged -= InputDevice_InputChanged;
+        }
+
+        private void Timer_Tick(object sender, EventArgs e)
+        {
+            Model.Background = Brushes.White;
+        }
+
+        private void InputDevice_InputChanged(object sender, DeviceInputChangedEventArgs e)
+        {
+            Model.Background = Brushes.LightGreen;
+            timer.Stop();
+            timer.Start();
+        }
     }
 }
diff --git a/XOutput/UI/Windows/AutoConfigureViewModel.cs b/XOutput/UI/Windows/AutoConfigureViewModel.cs
index a41fd7fe..ed9bad3a 100644
--- a/XOutput/UI/Windows/AutoConfigureViewModel.cs
+++ b/XOutput/UI/Windows/AutoConfigureViewModel.cs
@@ -75,7 +75,7 @@ private void ReadValues(object sender, DeviceInputChangedEventArgs e)
         {
             Enum maxType = null;
             double maxDiff = 0;
-            foreach (var type in inputTypes)
+            foreach (var type in e.ChangedValues)
             {
                 double oldValue = referenceValues[type];
                 double newValue = controller.InputDevice.Get(type);
diff --git a/XOutput/UI/Windows/MainWindowViewModel.cs b/XOutput/UI/Windows/MainWindowViewModel.cs
index e7ea9b69..51e1524a 100644
--- a/XOutput/UI/Windows/MainWindowViewModel.cs
+++ b/XOutput/UI/Windows/MainWindowViewModel.cs
@@ -196,6 +196,7 @@ public void RefreshGameControllers()
                 var controller = controllerView.ViewModel.Model.Controller;
                 if (controller.InputDevice is DirectDevice && (!instances.Any(x => x.InstanceGuid == ((DirectDevice)controller.InputDevice).Id) || !controller.InputDevice.Connected))
                 {
+                    controllerView.ViewModel.Dispose();
                     controller.Dispose();
                     Model.Controllers.Remove(controllerView);
                     logger.Info($"{controller.ToString()} is disconnected.");
diff --git a/XOutput/XOutput.csproj b/XOutput/XOutput.csproj
index 4794f6bc..a774062b 100644
--- a/XOutput/XOutput.csproj
+++ b/XOutput/XOutput.csproj
@@ -80,6 +80,7 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </Page>
+    <Compile Include="Devices\DeviceState.cs" />
     <Compile Include="Tools\ArgumentParser.cs" />
     <Compile Include="Devices\DeviceInputChangedEventArgs.cs" />
     <Compile Include="Tools\Helper.cs" />