diff --git a/app/Aura.cs b/app/Aura.cs
index 3739c5f3..84977c28 100644
--- a/app/Aura.cs
+++ b/app/Aura.cs
@@ -161,13 +161,14 @@ namespace GHelper
             Color2 = Color.FromArgb(colorCode);
         }
 
-        private static IEnumerable<HidDevice> GetHidDevices(int[] deviceIds)
+
+        private static IEnumerable<HidDevice> GetHidDevices(int[] deviceIds, int minInput = 18)
         {
             HidDevice[] HidDeviceList = HidDevices.Enumerate(0x0b05, deviceIds).ToArray();
             foreach (HidDevice device in HidDeviceList)
                 if (device.IsConnected 
-                    && device.Capabilities.FeatureReportByteLength >= 64
-                    && device.Capabilities.InputReportByteLength >= 12) // 
+                    && device.Capabilities.FeatureReportByteLength > 0
+                    && device.Capabilities.InputReportByteLength >= minInput) // 
                     yield return device;
         }
 
@@ -275,7 +276,11 @@ namespace GHelper
             byte[] msg = AuraMessage(Mode, Color1, Color2, _speed);
 
             var devices = GetHidDevices(deviceIds);
-            //if (devices.Count() > 0) Logger.WriteLine("USB-KB = " + BitConverter.ToString(msg));
+            if (devices.Count() == 0)
+            {
+                Logger.WriteLine("USB-KB : not found");
+                GetHidDevices(deviceIds, 0);
+            }
 
             foreach (HidDevice device in devices)
             {
diff --git a/app/Gpu/NvidiaGpuControl.cs b/app/Gpu/NvidiaGpuControl.cs
index f757b1db..88f5f550 100644
--- a/app/Gpu/NvidiaGpuControl.cs
+++ b/app/Gpu/NvidiaGpuControl.cs
@@ -117,10 +117,10 @@ public class NvidiaGpuControl : IGpuControl
     {
         try
         {
-            string script = @"$device = Get-PnpDevice | Where-Object { $_.FriendlyName -imatch 'NVIDIA' -and $_.Class -eq 'Display' }; Disable-PnpDevice $device.InstanceId -Confirm:$false; Start-Sleep -Seconds 2; Enable-PnpDevice $device.InstanceId -Confirm:$false";
+            string script = @"$device = Get-PnpDevice | Where-Object { $_.FriendlyName -imatch 'NVIDIA' -and $_.Class -eq 'Display' }; Disable-PnpDevice $device.InstanceId -Confirm:$false; Start-Sleep -Seconds 3; Enable-PnpDevice $device.InstanceId -Confirm:$false";
             Logger.WriteLine(script);
             RunCMD("powershell", script);
-            Thread.Sleep(2000);
+            //Thread.Sleep(2000);
             return true;
         }
         catch (Exception ex )
diff --git a/app/HardwareControl.cs b/app/HardwareControl.cs
index 11906250..0c5e68cb 100644
--- a/app/HardwareControl.cs
+++ b/app/HardwareControl.cs
@@ -115,10 +115,14 @@ public static class HardwareControl
 
     public static bool IsUsedGPU(int threshold = 20)
     {
-        if (GetGpuUse() > threshold)
+        int use = GetGpuUse();
+        Logger.WriteLine("GPU usage: " + use);
+        if (use > threshold)
         {
             Thread.Sleep(1000);
-            return (GetGpuUse() > threshold);
+            use = GetGpuUse();
+            Logger.WriteLine("GPU usage: " + use);
+            return (use > threshold);
         }
         return false;
     }