application freeze on niceDCV resize desktop operation

[flat-eric147]

I am having an interesting issue to report. I am using OpenTK within a windows WPF application. It works perfectly fine and I am doing very basic OpenGL stuff in there (mainly visualizing a videostream). I encountered an issue when using my application on an AWS instance using niceDCV. niceDCV has a feature where you can resize the windows and it does resize the "remote" desktop accordingly (that behaviour can be switched off however). My application starts to freeze whenever this kind of operation takes place. I managed to create a stack trace and it mostly looks like this:

System.Threading.WaitHandle.WaitOneNoCheck(Int32) System.Windows.Interop.D3DImage.LockImpl(System.Windows.Duration) System.Windows.Interop.D3DImage.Lock() OpenTK.Wpf.GLWpfControlRenderer.Render(System.Windows.Media.DrawingContext) OpenTK.Wpf.GLWpfControl.OnRender(System.Windows.Media.DrawingContext) System.Windows.UIElement.Arrange(System.Windows.Rect) System.Windows.ContextLayoutManager.UpdateLayout() System.Windows.ContextLayoutManager.UpdateLayoutCallback(System.Object) [...] I am a little bit lost on how to further debug or fix this issue. It "feels" like some d3d handle got disposed without OpenTK's knowledge. Any input/hint appreciated !

[flat-eric147]

I ran a minimal sample project on the target machine building the GLwpfControl on my own in debug, when running and resizing the desktop I get the following stack trace:

PresentationCore.dll!System.Windows.Media.Composition.DUCE.Channel.SyncFlush() Line 220 C# PresentationCore.dll!System.Windows.Interop.HwndTarget.UpdateWindowSettings(bool enableRenderTarget, System.Windows.Media.Composition.DUCE.ChannelSet? channelSet) Line 1321 C# PresentationCore.dll!System.Windows.Interop.HwndTarget.UpdateWindowPos(nint lParam) Line 1215 C# PresentationCore.dll!System.Windows.Interop.HwndTarget.HandleMessage(MS.Internal.Interop.WindowMessage msg, nint wparam, nint lparam) Line 770 C# WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(nint hwnd, int msg, nint wParam, nint lParam, ref bool handled) Unknown WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) Unknown WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) Unknown WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) Unknown WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(nint hwnd, int msg, nint wParam, nint lParam) Unknown [Native to Managed Transition]
[Managed to Native Transition]
PresentationFramework.dll!System.Windows.Window.UpdateHwndPositionOnTopLeftChange(double leftLogicalUnits, double topLogicalUnits) Unknown PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown WindowsBase.dll!System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty dp, object value, System.Windows.PropertyMetadata metadata, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType, bool isInternal) Unknown WindowsBase.dll!System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty dp, object value) Unknown Microsoft.VisualStudio.DesignTools.WpfTap.dll!Microsoft.VisualStudio.DesignTools.WpfTap.WpfVisualTreeService.Adorners.AdornerWindow.UpdatePlacement() Unknown Microsoft.VisualStudio.DesignTools.WpfTap.dll!Microsoft.VisualStudio.DesignTools.WpfTap.Utility.DispatcherUtility.SafeInvokeAsync.AnonymousMethod__0() Unknown WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeDelegateCore() Unknown WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeImpl() Unknown WindowsBase.dll!MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(object obj) Unknown System.Private.CoreLib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Line 138 C# WindowsBase.dll!MS.Internal.CulturePreservingExecutionContext.Run(MS.Internal.CulturePreservingExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown WindowsBase.dll!System.Windows.Threading.DispatcherOperation.Invoke() Unknown WindowsBase.dll!System.Windows.Threading.Dispatcher.ProcessQueue() Unknown WindowsBase.dll!System.Windows.Threading.Dispatcher.WndProcHook(nint hwnd, int msg, nint wParam, nint lParam, ref bool handled) Unknown WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(nint hwnd, int msg, nint wParam, nint lParam, ref bool handled) Unknown WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) Unknown WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) Unknown WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) Unknown WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(nint hwnd, int msg, nint wParam, nint lParam) Unknown [Native to Managed Transition]
[Managed to Native Transition]
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame) Unknown PresentationFramework.dll!System.Windows.Application.RunDispatcher(object ignore) Unknown PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) Unknown testOpengl.dll!testOpengl.App.Main() Unknown

The code looks like this (just played with various settings for Profile, ContextFlag and versions but they don't change a thing):

public partial class MainWindow : Window { public MainWindow() { InitializeComponent();

    var settings = new GLWpfControlSettings
     {
         MajorVersion = 3,
         MinorVersion = 3,
         RenderContinuously = true,
         Profile = OpenTK.Windowing.Common.ContextProfile.Compatability,
         ContextFlags = OpenTK.Windowing.Common.ContextFlags.Offscreen
     };
     OpenTkControl.Start(settings);
 }

 private float col = 0;
 private void OpenTkControl_OnRender(TimeSpan delta)
 {
     col = (col + 0.01f) % 1;
     GL.ClearColor(col, 1, 1, 1);

     GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
 }

}

[flat-eric147]

And another update... Sorry for all the noise. But maybe it helps the desperate soul. On the server side of Nice DCV the option "IDD Driver" needs to be disabled.

https://www.ni-sp.com/support/nice-dcv-tips-and-tricks/#h-how-to-disable-the-windows-idd-driver-in-nice-dcv Once that's disable everything runs fine when resizing the nicedcv window.

[NogginBops]

This feels like we want to investigate why it is happening and if there is some way for us to support this. I'm guessing the crash is because the IDD driver does some resize operation while our code doesn't expect it.. I'll reopen this issue just to see if I can figure something out, if I don't I'll close the issue.

[flat-eric147]

Hi, happy to help and test this. The resizing works fine without IDD. I closed this since it felt like a very rare use case.

[NogginBops]

It might be a very rare use case, but it would be good to know why it happens and if any other software causes the same issue.

(oops I managed to close the issue, reopened again)