I think at this point in my upcoming transition to FreeBSD, I have chosen to use MATE for my DE. I have one concern however, and I have seen this problem on more than one box. That is, some windows will have a very latent reaction from my mouse input to the motion being displayed on the monitor, by even 0.5-1 seconds. I have noticed this more with terminal windows. Is this a problem with a known fix? Right now I'm using a really old desktop with an AMD Phenom, but I'm mainly interested in what I will have to do for my desktop which is using a Ryzen 1600 with a GTX 1070, and I expect to use the Nvidia proprietary drivers. I installed the xf86-video-ati package since this test desktop has integrated AMD graphics (Radeon HD 3200), that mostly fixed the issue.