Эффекты рабочего стола недоступны на данной системе по следующим техническим причинам:
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.
Попытаться использовать OpenGL.
Что бы это значило?
