Win32CaptureSample: GraphicsCapturePicker breaks Windows Explorer after display is unplugged

Question

Win32CaptureSample: GraphicsCapturePicker breaks Windows Explorer after display is unplugged

DonF 1

System Info: Windows 10 Pro x64 10.0.19041 running on Lenovo L540
Visusal Studio 2019 V16.8.2
Windows SDK: 10.0.19041.0
Platform Toolset: VS 2019 (v142)
Microsoft.Windows.CppWinRT nuget package v2.0.201217.4

Laptop has 2 external displays plugged in.

Repro Steps:

Get and build Win32CaptureSample-master
Start the app and press "Open Picker" to show the GraphicsCapturePicker popup
Unplug one of the external displays
Press cancel on the GraphicsCapturePicker popup

At this point Windows Explorer is in a bad state. Clicking Windows Icon in the task bar does not bring up the start menu. Right clicking any of the app icons in the task bar does not bring up the context menu. Clicking the "Open Picker" button on the Win32CaptureSample app brings up a blank window instead of the GraphicsCapturePicker. It was necessary to restart Windows Explorer from the Task Manager in order to recover.

Running the same steps as above with only 1 external display will result in Win32CaptureSample throwing an exception when the display is unplugged.

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Answer 1

AryaDing-MSFT 2,916

Hello,

Welcome to Microsoft Q&A!

Currently, Microsoft Q&A supports the products listed over here (more to be added later on).
Your sample comes from third party, it is out of scope. You could report your problem with Github issue of third party sample.

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DonF 1 Reputation point

2021-01-20T13:52:21.527+00:00

I only refer to Win32CaptureSample as a way for Microsoft to reproduce the issue. The issue is not specific to the Win32CaptureSample app; it also happens in my application which uses winrt::Windows::Graphics::Capture::GraphicsCapturePicker. The bug seems with the GraphicsCapturePicker and the way it interacts with Windows Explorer when Displays are removed. I will repost the issue on the forum that you suggest but I think someone at Microsoft should take a look at this since there seems to be a serious problem in the winrt::Windows::Graphics::Capture namespace.
AryaDing-MSFT 2,916 Reputation points

2021-01-21T08:43:20.837+00:00

@DonF Due to the forum policy, Microsoft Q&A does not handle questions that related to third party libraries.
If you could reproduce the issue in your own project, you could ask a new question here in Micorosft Q&A with the winapi tag if it is a win32 application.

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Win32CaptureSample: GraphicsCapturePicker breaks Windows Explorer after display is unplugged

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