Hi, I don’t think you will ever be able to do it from Qt. I might be wrong though….
On Windows, you need to use Windows to set that preference: https://www.itechtics.com/use-specific-gpu/ <https://www.itechtics.com/use-specific-gpu/> There is another possible way which is setting a piece of code which will do the trick: #ifdef Q_OS_WIN extern "C" { __declspec(dllexport) unsigned long NvOptimusEnablement = 0x00000001; // for NVIDIA } extern "C" { __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1; // for AMD } #endif Since you have an AMD and a NVIDIA, I don’t know how it will behave in that case… :/ Best regards, Nuno > On 6 May 2022, at 04:33, 乔燊 <1500013...@pku.edu.cn> wrote: > > It seems that there are no appropriate functions that can set the GPU used by > QQuickWindow/QQuickView. > > > > I'm using qt6.3 on windows11. I have two graphics card on my laptop: > > > Device name: AMD Radeon(TM) Graphics > Device type: integrated > Device name: NVIDIA GeForce RTX 3060 Laptop GPU > Device type: discrete > I tried to use vulkan by calling QQuickView::setGraphicsApi, but found > nowhere to set GPU to use. Meanwhile the widget class QVulkanWindow gives us > a convenient function QVulkanWindow::setPhysicalDeviceIndex for doing this. > > > > Perhaps the setting up with class QQuickRenderControl is possible, but there > is too much stuff to take care of for merely selecting a GPU device. I > thought it would be a common demand for all desktop developer, not only those > using Vulkan. > > > > Is there any plan on adding related function to select from GPUs? Or maybe > there is another already-exist solution for that? > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest
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