I've just noticed that the periodic lag starts happening right after the "background" (behind the lightdm dots) fades in. While only the dots are visible on the screen (before the background fades in), there is no lag in mouse movement.
I've just noticed that the periodic lag starts happening right after the "background" (behind the lightdm dots) fades in. While only the dots are visible on the screen (before the background fades in), there is no lag in mouse movement.