Turns out, there is a significant complication in my situation. A few months ago I sprung for a very awesome Samsung LU32R591CWNXZA 32" 4k UHD Curved Monitor. This monitor has great color, the curve ,makes a big difference for my old eyes. I do programming and general web/video viewing not gaming.
That catch is that Samsung monitor has no sync (Adaptive Sync, FreeSync, and G-Sync). I had no idea that would matter. This monitor wants to run at 60Hz. The RX 580 has HDMI 1.2 (which runs at 30Hz and Display Port ( I forgot the version), that runs 60 HZ EXCEPT SURPRISE!, Catalina does not support display port. I did not that would be possible but my ignorance knows few bounds.
That leaves me with a monitor that runs flakey with my computer. Usually, the flashihng off disappears after 10-20 minutes, but not always. I think it depends on what I am running at the time.
As I understand it, the Available FIXES are:
1. Swallow hard and dedicate my curved 4k to my day job. I want that 4k on my mac but that is a not going to be too great unless I get a different monitor, with one or more of the syncs so it runs decent on hdmi 1.2
2. Upgrade from Catalina. I rely on this computer. it is long in the tooth, I should get a newer computer instead of risking surgery on the OS
3. Find my next computer.
Among those, the only relatively cheap easy one is suffering the humiliation of runnng my better monitor on my day job computer, which runs the curved Samsung no problem.
It is bad enough to crumble to my day job, but even worse, ,my job runs ..... the name of the system on my day job is sickening to think. Saying or typing it is against my spiritual beliefs. My system at work is called w-i-n-d-o-w-s. Example: windows gives no easy way to use a number like 123456789, because it turns it into 1.23X10^9. Windows has no functions for handling dates, except functions that don't work. My company created its own data type to run in oracle with date and time in one field. When we run into problems like that, we have retards who say MS Access will solve the problem
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giving my curved 4k to that scene is sinful.
finding a 4k monitor that works well with hdmi2. I have been running one like that for years, The reason I need two 4k monitors is to connect one to my laptop from work and ther other to my computer, which run side by side on my desk. I usually keep the 4k connect to my computer, but there are times when that is not that awesome for work to be running without a 2nd monitor.
