Mouse cursor speed is too high on Linux environment
From SDL version of Pyxel (>= 1.1), Pyxel's mouse cursor speed is higher than normal mouse cursor speed on my Ubuntu VM environment.

So when I move the mouse cursor across the Pyxel's window. It acceralates when the cursor on the Pyxel window and slow down outside the window.

Does this issue happen on other Linux environment?
Does anyone know how to fix it?

I think this issue is caused by some parameter setting of SDL2.