X570 AORUS MASTER - there is some issue with LAN2 2.5G Eth interface. I don't see this interface's MAC in BIOS -- "LAN2 MAC Address N/A" in System Unfo. "Onboard LAN2 Controller" is in Enabled in BIOS.
Linux Ubuntu 19.10 don't see this device -- nothing in dmesg-lspci etc.
I have 2 NVMe SSD in first 2 pcie slots installed (M2A and M2B in BIOS).
BIOS version is F11.