| Summary: | Kdenlive crashes on startup when KDE desktop uses Vulkan rendering (Qt 6.9, NVIDIA) | ||
|---|---|---|---|
| Product: | [Applications] kdenlive | Reporter: | lolkek202k |
| Component: | User Interface & Miscellaneous | Assignee: | Jean-Baptiste Mardelle <jb> |
| Status: | RESOLVED FIXED | ||
| Severity: | crash | CC: | berndmj, grekerplayyt, sprotask |
| Priority: | NOR | Keywords: | triaged |
| Version First Reported In: | 25.04.1 | ||
| Target Milestone: | --- | ||
| Platform: | Arch Linux | ||
| OS: | Linux | ||
| Latest Commit: | https://invent.kde.org/multimedia/kdenlive/-/commit/15a47dacdc31f60ef71a501fc23d5557b3268411 | Version Fixed/Implemented In: | 25.08.0 |
| Sentry Crash Report: | |||
| Attachments: | Backtrace | ||
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 |
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)