https://bugs.kde.org/show_bug.cgi?id=406180
--- Comment #37 from Erik Kurzinger <ekurzin...@nvidia.com> ---
> Do you mean "the first time the switcher is displayed after kwin process
> started"?
Yes, that's what I meant. Maybe also after restarting compositing.
This patch to qtbase seems to fix things for me if you want to give it a shot.
diff --git
a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
index 4adf662152..434ea60bfb 100644
--- a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
+++ b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp
@@ -601,6 +601,7 @@ void QGLXContext::doneCurrent()
else
glXMakeCurrent(m_display, 0, 0);
m_isPBufferCurrent = false;
+ m_swapInterval = -1;
}
void QGLXContext::swapBuffers(QPlatformSurface *surface)
--
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