https://bugs.kde.org/show_bug.cgi?id=495260

--- Comment #7 from patchouli <patchouli.knowledge....@gmail.com> ---
After some extra tinkering I found the following:

- Plasma on X11 does not have the issue.
- Going from the open kernel modules NVIDIA drivers to the closed kernel
modules (`nvidia-open` to `nvidia` on Arch Linux) and disabling the GSP
firmware fixes the issue
- Other Wayland compositors (Hyprland and GNOME) do not have the issue either,
even with the GSP firmware enabled and while using the open kernel modules. So
for some reason, KWin (Wayland) works very poorly with this enabled and other
compositors do not suffer from the same issue. The GPU scores identically
(within margin of error) on benchmarks with either the open kernel modules, or
the closed ones with the GSP firmware disabled on various OpenGL benchmarks.
- Triple buffering also exhibits the issue, just on a much lower frequency and
not to the same degree. I read on the implementation and it’s supposed to
increase the performance for lower end hardware; and my RTX 4090 is somehow
also affected by that too.

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