I can't enter bios with my Radeon VII if I use my 21:9 LG monitor (3840x1600), if I connect an old monitor I'm able to get into BIOS. If I use an old GeForce 970 or Vega 64 I don't have any issues.
It not just that it can't display the bios, but it completely ignore Delete press in boot process and go into Windows.
I have updated the vBios using ADVANCED MICRO DEVICES, INC. VBIOS END USER SOFTWARE LICENSE AGREEMENT (OBJECT CODE ONLY) | AMD but din't change anything.
016.004.000.030.011639 to 016.004.000.038.011717
GPU Sapphire Radeon vii
Mortherboard Asus Zenith (x399) 1701bios
CPU Threadripper 1950
Monitor lg 38uc99-w (can't eventer bios)
Samsung TV via hdmi (can enter bios)
Samsung 16:9 monitor (can enter bios)