qopenglwidget crashes

Hi,

I have soem issues when using QOpenGlWidget on some machines if qt tries to use openg32sw,dll

1. if this file is not found then I get a crash in QBackingStoreDefaultCompositor::flush where swapchain is a nullptr then.
   1. callstack:

   2. >    Qt6Guid.dll!QBackingStoreDefaultCompositor::flush(QPlatformBackingStore * backingStore, QRhi * rhi, QRhiSwapChain * swapchain, QWindow * window, double sourceDevicePixelRatio, const QRegion & region, const QPoint & offset, QPlatformTextureList * textures, bool translucentBackground) Line 455    C++
           Qt6Guid.dll!QPlatformBackingStore::rhiFlush(QWindow * window, double sourceDevicePixelRatio, const QRegion & region, const QPoint & offset, QPlatformTextureList * textures, bool translucentBackground) Line 192    C++
           Qt6Widgetsd.dll!QWidgetRepaintManager::flush(QWidget * widget, const QRegion & region, QPlatformTextureList * widgetTextures) Line 1052    C++
           Qt6Widgetsd.dll!QWidgetRepaintManager::flush() Line 976    C++
           Qt6Widgetsd.dll!QWidgetRepaintManager::paintAndFlush() Line 908    C++
           Qt6Widgetsd.dll!QWidgetRepaintManager::sync(QWidget * exposedWidget, const QRegion & exposedRegion) Line 629    C++
           Qt6Widgetsd.dll!QWidgetPrivate::syncBackingStore(const QRegion & region) Line 1769    C++
           Qt6Widgetsd.dll!QWidgetWindow::handleExposeEvent(QExposeEvent * event) Line 1007    C++
           Qt6Widgetsd.dll!QWidgetWindow::event(QEvent * event) Line 289    C++
           Qt6Widgetsd.dll!QApplicationPrivate::notify_helper(QObject * receiver, QEvent * e) Line 3315    C++
       

1. if opengl32sw has been found, then resulting screen is black instead
2. qt is built with INPUT_opengl=dynamic

So, what is the correct way to use QOpenGlWidget on those systems?