https://bugs.kde.org/show_bug.cgi?id=515340

            Bug ID: 515340
           Summary: Jitter
    Classification: Plasma
           Product: kwin
      Version First 6.5.5
       Reported In:
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: compositing
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

Created attachment 189095
  --> https://bugs.kde.org/attachment.cgi?id=189095&action=edit
system-info.txt

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 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.

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