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KDE Plasma Compositor and Window Manager (KWin) has been maintained by Martin Gräßlin1 since 2010.
kwin is a compositor for wayland display server
OpenGL compositing (the default) has crashed KWin in the past.
This was most likely due to a driver bug.
If you think that you have meanwhile upgraded to a stable driver,
you can reset this protection but be aware that this might result in an immediate crash!
Alternatively, you might want to use the XRender backend instead.