[Bug 60511] New: Qt 6.11.3 qml.exe: QML window never updates after the first frame (default Direct3D 11 backend)

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60511

            Bug ID: 60511
           Summary: Qt 6.11.3 qml.exe: QML window never updates after the
                    first frame (default Direct3D 11 backend)
           Product: Wine
           Version: 10.0
          Hardware: x86-64
               URL: https://download.qt.io/online/qtsdkrepository/windows_
                    x86/desktop/qt6_6113/qt6_6113_mingw/qt.qt6.6113.win64_
                    mingw/
                OS: Linux
            Status: UNCONFIRMED
          Keywords: download, source, testcase
          Severity: normal
          Priority: P2
         Component: d3d
          Assignee: [e-mail]
          Reporter: [e-mail]
  Target Milestone: ---
      Distribution: ---

Created attachment 82367
  --> http://bugs.winehq.org/attachment.cgi?id=82367
counter.qml (testcase)

Qt 6 draws Qt Quick (QML) windows with Direct3D 11 by default on Windows. With
Wine's builtin d3d11/dxgi, such a window only ever shows its first frame. The
application keeps running, but later changes to the scene never appear on
screen.

Steps to reproduce:
1. Download the official Qt 6.11.3 MinGW packages for Windows from the URL
above: qtbase, qtdeclarative, the MinGW runtime and d3dcompiler_47 (SHA1
below), and extract them into one directory.
2. Copy libgcc_s_seh-1.dll, libstdc++-6.dll, libwinpthread-1.dll and
d3dcompiler_47.dll into bin/, next to qml.exe.
3. Save the attached counter.qml (a 1-second Timer that increments a counter
shown in a Text item and in the window title).
4. wine bin/qml.exe counter.qml

Expected: the text counts up every second ("ticks: 1", "ticks: 2", ...).

Actual: the window keeps showing "ticks: 0". The timer does run: after 10
seconds the window title, bound to the same counter, reads "qt6-d3d11-counter
8" while the content still shows "ticks: 0".

The same test with QSG_RHI_BACKEND=opengl (Qt Quick on OpenGL instead of D3D11)
counts normally. It also counts normally with DXVK instead of the builtin
d3d11/dxgi.

Tested with wine-11.16-1379-g5b6b85421c2 (current git, after 11.19, unmodified,
clean prefix), and also seen with Wine 10.0 and 11.0. Complete terminal output
attached.

Possible clue, from the terminal output:
  fixme:d3d:wined3d_swapchain_init Unimplemented swap effect 0x2.
Qt creates a flip-model swapchain here; the displayed image never changes after
the first Present.

Bug 56799 (JUCE GUIs hang with the builtin dxgi) may be related.

System: Ubuntu 26.04.1 LTS x86_64, GNOME Shell 50.1 Wayland session (XWayland,
winex11.drv), NVIDIA GeForce RTX 5070 Ti with driver 615.71.09.

SHA1 of the Qt archives used:
f051a4dfa3dc0ea6edd1afa1cb26fdffcd3ac81d 
6.11.3-0-202609240253qtbase-Windows-Windows_11_24H2-Mingw-Windows-Windows_11_24H2-X86_64.7z
54c9c8d76009bc0e365ab17b660f48411ccca57d 
6.11.3-0-202609240253qtdeclarative-Windows-Windows_11_24H2-Mingw-Windows-Windows_11_24H2-X86_64.7z
6a0888995df2efed352688f238f275094bb26d44 
6.11.3-0-202609240253MinGW-w64-x86_64-13.1.0-release-posix-seh-msvcrt-rt_v11-rev1-runtime.7z
e1d197a16e5368647d03eb6d920d7c8444615d07 
6.11.3-0-202609240253d3dcompiler_47-x64.7z

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[Bug 60511] Qt 6.11.3 qml.exe: QML window never updates after the first frame (default Direct3D 11 backend)

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60511

--- Comment #1 from [e-mail] ---
Created attachment 82368
  --> http://bugs.winehq.org/attachment.cgi?id=82368
Complete terminal output (wine-11.16-1379-g5b6b85421c2, builtin d3d11, 10 s)

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