A1222+ and Radeon RX550 - works in boot menu but not AmigaOs 4.1

[OldAmigan]

@kubatyszko

I only have Display Ports on my Radeon R550 card in my A1222 Plus and it works fine.

Is the monitor OK for the resolution you are using? Or is the correct resolution in the list?

When I first got my setup, even after a fresh installation, I had problems until I manually inserted the resolutions I wanted in Prefs:ScreenMode preferences/Monitorscli