🫨 Jitter on animations

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Desktop animations show quite inconsistent performance, in the form of jitter. Sometimes animations are butter-smooth, others they are completely choppy.

I have tried isolating the cause, but I was unable to. The only differences I could tell are these:

- If you install optimus-manager and nvidia-open, and I use X11, animations are always smooth. On both the internal and external screen. Still they are inconsistent on Wayland.

- If you run OBS on Wayland, with the display as source, animations will always show jitter.

Things I have tried without perceiving a clear difference:

- Using the modesetting driver, or nvidia-open, or nvidia proprietary.

  • In /etc/profile.d/optimus.sh doing export __NV_PRIME_RENDER_OFFLOAD=1 and export __GLX_VENDOR_LIBRARY_NAME="nvidia". Or the opposite export __EGL_VENDOR_LIBRARY_FILENAMES="/usr/share/glvnd/egl_vendor.d/50_mesa.json".
  • Using an external monitor, or only the internal one.
  • Setting multiple Kwin Environment Variables.

I have also reported the bug here.

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