Mario –
Many thanks for putting in the extra time and effort to figure all this out. I was away for the long weekend or I would have responded sooner.
I think it’s likely that I’ll go with option 2 (downgrade the Kernel to 5.13). If I have issues with that approach I’ll try for option 3 (disable “modern AMD DisplayCore”).
Since the Polaris GPU architecture isn’t going to be happy without workarounds, I’ll plan on getting new cards. If you’d like me to purchase another round of support for some advice on a new card, I’ll be happy to do so but I’ll just ask my question first and you can let me know if you’d like me to shell out before answering:
I had a whole paragraph here that I now (~40 minutes later) realize is redundant. I think the “Vega 10” chip series is the newest one to have been tested by an end user, so I could go with a Vega card, but it seems likely that newer cards (e.g. the RX 6600) will work just fine. I think it’s likely I’ll purchase a couple of the 6600s (not newer because my PCs only have PCIe 3.0 and the RX6000 series is designed with PCIe 4.0 in mind). If I’ve missed something please let me know.
Best,
– jph