It was there in Crimson-ReLive-16.12.2 which is the newest version which works without mouse lag.
I have been reading that disabling HDCP stops the mouse lag and video stutter and erratic performance.
Could the setting have been moved to somewhere else?
AMD Radeon R4 Graphics
Dell Inspiron 3541 Laptop
Windows 10 Home 64bit 1909
Radeon Software Adrenalin-2020-20.2.2
DDC Display - EDP (AMD Radeon(TM)R4 Graphics)
Dell Inspiron 3541 Motherboard Bios Version A07
AMD A6-6310 APU with AMD Radeon R4 Graphics
Can't find Power supply model on laptop