https://bugs.kde.org/show_bug.cgi?id=431505
Bug ID: 431505
Summary: Kdenlive crashes instantly on Wayland due to EGL
format mismatch
Product: kdenlive
Version: 20.12.1
Platform: FreeBSD Ports
OS: FreeBSD
Status: REPORTED
Severity: normal
Priority: NOR
Component: User Interface
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
As soon as the kdenlive window appears, it crashes:
QWaylandGLContext::makeCurrent: eglError: 3009, this: 0xb99e12c94a0
QWaylandGLContext::makeCurrent: eglError: 3009, this: 0xb99e12c9080
QWaylandGLContext::makeCurrent: eglError: 3009, this: 0xb99f643c780
QOpenGLFunctions created with non-current context
ASSERT: "QOpenGLFunctions::isInitialized(d_ptr)" in file
/usr/local/include/qt5/QtGui/qopenglfunctions.h, line 949
It seems that Qt (still) doesn't implement pbuffer support on Wayland-EGL, so
an invisible wayland surface is used.
This means that the formats of the offscreen surface and the window surface
have to match, otherwise EGL refuses to makeCurrent and everything breaks.
Specifically the issue seems to be the lack of depth and stencil buffer.
This patch lets kdenlive work on wayland at least without the GPU engine (that
one throws an egl error 3002 - EGL_BAD_ACCESS in makeCurrent):
--- src/monitor/glwidget.cpp.orig 2021-01-12 13:57:33 UTC
+++ src/monitor/glwidget.cpp
@@ -120,7 +120,10 @@ GLWidget::GLWidget(int id, QObject *parent)
setPersistentSceneGraph(true);
setClearBeforeRendering(false);
setResizeMode(QQuickView::SizeRootObjectToView);
-
m_offscreenSurface.setFormat(QOpenGLContext::globalShareContext()->format());
+ auto fmt = QOpenGLContext::globalShareContext()->format();
+ fmt.setDepthBufferSize(format().depthBufferSize());
+ fmt.setStencilBufferSize(format().stencilBufferSize());
+ m_offscreenSurface.setFormat(fmt);
m_offscreenSurface.create();
m_refreshTimer.setSingleShot(true);
SOFTWARE/OS VERSIONS
FreeBSD: 13-CURRENT + drm 5.4-lts
Mesa(RadeonSI): master
Wayfire/wlroots: master
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2
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