Is the 2400g graphics disabled and the 580 set as initial display, have you tried a manual full download/save/install(custom/clean install) of the 580 driver pack direct from amd driver site.
My PC- Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, NM790 2TB, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T.