Hi pete,
Sorry, I forgot important information. Its resolution is 320x240 monochrome screen. I noticed some errors in the input device file. The mouse was not configured, but it executed the mouse_ read. The problem seems to have disappeared now, and the touch on the screen has become smoother. You can focus on the input device file first.
https://forum.lvgl.io/t/how-to-display-mouse-arrows-on-the-screen/12353/1