Each time I try AMD graphics, something is fucked for me. Back with fglrx, fglrx just sucked, so I used Nvidia. Then I had an AMD right around when they finally had opensource drivers, but it was still buggy as hell. So I went with Nvidia again (first a GTX 790, then a GTX 1060). In the meantime I had a new work notebook where I also went with an AMD APU, and had driver crashes for a long time when I was in video calls and it had to decode multiple streams. That thankfully stabilized with Linux 6.4.
Since sooo many people in the community swear by AMD, I thought "dammit, let's try it again for my new desktop" and got an 7800rx ... and I have to reboot ~5 times until I finally make it to a running xserver or wayland session. Apparently I am hit by this problem (at least I hope so). But that doesn't even read nice ... the fix seems to be to revert another fix for powermanagement. So I either have a mostly non-booting card or suboptimal power management.
I start to regret having chosen AMD .... again :-/ I seem to be cursed.
It could be your monitor or even monitor cable. I have this monitor which absolutely fucking refuses to work with AMD oved HDMI. If you have inexplicable system sleep issues, black screen issues, startup issues, etc. It could be the monitor at fault
While it's a possibility, I think it's unlikely, since the machine works fine with Windows. I also compiled the tkg 6.7.2 kernel which includes the revert-patch for the offending change and so far the machine booted three times without issues, so it seems to fit.
That doesn't rule out the possibility of display issues tho, back when I had the faulty monitor it was much more severe under Linux, I never managed to track it down tho (using AMD hardware for over 10 years now, this one issue busted my nuts pretty hard)
If you have a TV or something, at least try it to rule out possible outside factors
Windows and Linux are quite different in display handling. I remember when I had the faulty monitor, Linux had more severe problems. Never managed to track it down tho, ended up with a new monitor instead. Been using various AMD hardware for 10 years now, and that particular monitor busted my nuts pretty bad