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...ffect showing artefacts. I noticed that KWin's EffectFrames are rendered incorrectly with nouveau and current kwin trunk (please see attached screenshot). There has been a change between 4.5 and current trunk, so I cannot say if the same problem exsists with 4.5. as well. The EffectFrame is a GLTexture generated with TextureFromPixmap from a Qt QPixmap. In the screenshot we see that the icons are rendered correctly (also using QPixmap -> TFP -> GLTexture conversion) while the other textures are rendered incorrectly. This includes the pure black background texture, the textures generated fr...