That helped my mouse lag. I have 3 monitors also. Similar setup with different connection types. Windows 7 pro with Radeon RX560. I disabled HDCP on both of my newer 27 inch monitors and no more mouse lag. I also had the mouse lag on 18.7.1. No mouse lag on 18.6.1.
Thanks, was having this issue on a dual display setup using 18.8.1 too.
Had to disable HDCP on both my monitors in order for the mouse lag to go away.
This totally worked for me. rx570 18.10.1, 5 monitors. I was running 17.something before and never upgraded due to this dumb bug. Mouse trailing pointer worked for me but was annoying. I noticed that dragging a window around would prevent a stutter, it was only when I was moving my mouse around for no reason that it would happen. I also found out by playing with eyefinity, just by clicking quick setup, then discarding, it would make the problem go away.
It definitely has something to do with higher performance or something. That's what the mouse pointer, mangifying glass, and dragging windows all have in common. It's forcing something in the pipeline under a little more "pressure" and keeps the stuttering at bay.
Finally, I tried disabling HDCP on one of the monitors and it seems to have fixed it. I didn't have to disable all 5, just one.
actually, I found out just doing it for 1 monitor was a fluke. I needed to do it for all monitors and restart.
Yes thank you so much for this; works in 18.10.1.
This fixed my AVERMEDIA c027 capture card also; don't know why searches don't show this. Had no idea the AMD driver allowed this.