@choreo
so sorry to hear that! I couldn't longer wait for a fix, so I kicked the W5700X…
On my System all those errors and phenomena were 100% caused by the GPU!
@flowrider
I have already tried that on a separate partition and the problem(s) still occurred on my System. Of cause I only can tell from my experience and Setup and I've tried really everything. I still believe if there would be a fix already outside in Big Sur that we already would have received a new Update for Catalina.
@Hotshoe
once again thank you so much for your answers and experience! I could not describe how happy I am.
I've recieved my new Vega 2 and what should I say… Vega in, trouble out *yeah* that's it, that's all.
Right from the first start no strange behavior, no flickering, no resizing start screen, no red Apple and no more Freezes or Kernel Panics as well! I've stressed the Machine as much as I can and it's rock solid as it should be.
And of cause I can now launch any Adobe CC App or FC right after wake up without crashes and no matter if the MP was in a short or deep sleep. Tested everything. All fine. Finally it is great to have my MP 7.1 at the same level of stability as my 6.1 was by years. Great improvement. Flicker free XDR Display is so 2020.
Another thing I noticed immediately was the noice… with the Vega II my MP is very silent. You can hear nearly nothing. The W5700X was also quite, but noticeable louder than now. Apparently there is so much wrong with this RDNA driven card or the Navi drivers or both – what do I know?
After I've heard that even on the MP 6.1 there are still some problems caused by the D700 GPUs and never have been fixed, I gave up waiting for a fix that maybe comes or maybe not. It sounds trivial but time is money! For the time I've spend searching for a solution to get the W5700X to work I'd now have two Vega II´s… *g anyway, problem is gone, MP runs and User is happy
Btw: Anybody wants a lightly used W5700X
with some special Effects?