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Compositor makes everything laggy on an external display

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karolproksa
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Hello, I have encountered a problem with KDE Plasma's default compositor on my machine.

The thing is that using it makes everything displayed on an external monitor quite laggy (judging by eye, I'd say about 30-40 FPS). When I disable the compositor it all works smooth, but I don't like using my computer that way, because then I lose transparency, blur, and most importantly Krohnkite (tiling script for KDE Plasma).

I'm sure that it is not a problem with hardware, because I'm using a laptop with 10th gen i7, RTX 2070, and 16GB of ram.

Thanks in advance for any help!
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aCOSwt
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- Which version of kwin ? If running 5.21, were things better with previous versions ?
- Which graphic adaptor ?
- Nominal refresh rate of each monitors ?


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