amd ryzen pro 5750g

Hi, I have a VM host with an ASRock Rack B550D4-4L mainboard with AMD Ryzen 7 PRO 5750G (with Radeon Graphics) CPU running a current PVE 8.1 with Kernel 6.5. # pveversion pve-manager/8.1.4/ec5affc9e41f1d79 (running kernel: 6.5.13-1-pve) The system runs very stable overall, but it only boots...