I purchased a PCIe to NVMe adapter, cloned the contents of my SATA SSD to the new drive on a different machine, installed the NVMe drive with my existing Fedora 37 install... and the new drive wouldn't boot past initializing the Radeon in my Blackbird. So, resigned to the incompatibility, I removed the NVMe drive, set up the SATA SSD again, and booted, only to see a new error appear in my Petitboot loader, kAFS not found, with an error code of -97. Booting afterward proceeds normally, up until the Radeon is initialized for the login screen, at which point the display signal gets flaky and visible artifacting occurs intermittently. Shutting the system down afterward proceeds more or less normally, as far as I can tell.
The issue appears to be limited to SATA0 and SATA1 - I can boot the machine normally from SATA2 or SATA3. I am genuinely flummoxed here - does anyone have any insight?