Well, your cursor would otherwise constantly damage every buffer underneath it, demanding constant redraws just from moving the mouse across. If you have 2 hard

Well, your cursor would otherwise constantly damage every buffer underneath it, demanding constant redraws just from moving the mouse across. If you have 2 hardware planes and simply composite one over the other at the hardware level, this won’t happen. If you ever had the “fortune” to get a kernel that is brokenly busy, you might have seen a completely irresponsive static image, but the cursor might still move. This is also due to this.