hello to me happened a strange thing... under catalina
before hd4600 works... i use switchresx but after unistalled... glitches at 2k res but 1080i goes rigth
now i have only 1078x768 video option... 3 mb and the monitor (lg 4k) see as low res monitor
not know how to restore ...
while i have also dual boot on mojave where is see full 2k without glitches... after i put on EFI kext some hdmi patches
but catalina still not works anymore at 108 or 2k resolution...