I always did make -j$(nproc --ignore=1) to avoid this while building cpp code. But this problem seems to be less severe if there are a lot of cores.

I think this was the setting https://www.maketecheasier.com/a-look-at-kde-desktop-effects/

Few years back I had to fiddle with the kwin rendering backend and select egl for nvidia.

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I also remember fiddling with secure boot on the bios menu.