Created attachment 180520 [details] Backtrace Kdenlive fails to start when Vulkan is used as the rendering backend in KDE Plasma 6 (Wayland). The application crashes immediately after launch with a segmentation fault. When the rendering mode is set to "Automatic" or QT_QUICK_BACKEND=software, Kdenlive starts correctly. Tested on Arch Linux with NVIDIA proprietary driver and Qt 6.9. ✅ Works: QT_QUICK_BACKEND=software KDE rendering mode: Automatic ❌ Crashes: KDE rendering mode: Vulkan (without additional environment variables) Info: GPU: NVIDIA GeForce RTX 3070 Ti Driver: 570.144-1 (proprietary) Qt version: 6.9.0 Kdenlive: 25.04.0-1 (from Arch repo)
I can confirm this issue. On my system, Kdenlive crashes with a segmentation fault when Plasma is running with the Vulkan renderer. However, Kdenlive works fine if I either: Set QT_QUICK_BACKEND=software, or Switch Plasma to the OpenGL renderer instead of Vulkan. QT_QUICK_BACKEND=opengl kdenlive still crashing when plasma renderer set to vulkan Operating System: Arch Linux KDE Plasma Version: 6.3.5 KDE Frameworks Version: 6.14.0 Qt Version: 6.9.0 Kernel Version: 6.14.6-2cachyos (64-bit) Graphics Platform: Wayland Processors: 16 × Intel® Core™ i7-10700K Memory: 31.3 GiB Graphics Processor: NVIDIA GeForce RTX 3060 Ti (proprietary driver)
*** Bug 505664 has been marked as a duplicate of this bug. ***
Git commit 15a47dacdc31f60ef71a501fc23d5557b3268411 by Jean-Baptiste Mardelle. Committed on 27/07/2025 at 14:01. Pushed by mardelle into branch 'release/25.08'. Fix startup crash when QML Graphics API is set to Vulkan FIXED-IN: 25.08.0 M +4 -0 src/monitor/monitor.cpp https://invent.kde.org/multimedia/kdenlive/-/commit/15a47dacdc31f60ef71a501fc23d5557b3268411