Are you running an 32bit or 64bit os on the pi?

is there any update on that topic? I also have a few pi4 with ubuntu 20.04.02 LTS 64bit and connectwise on them... but it seams that I only get blank screen. Even doh fb test script gives me out following output:

gcc not found. Installing gcc.
Installed gcc successfully.
------------------------------------------------------
Details for Frame Buffer /dev/fb0:
Width : 1024
Height : 768
Stride : 4096
Bits Per Pixel : 32
Red Offset : 16
Green Offset : 8
Blue Offset : 0
Red Length : 8
Green Length : 8
Blue Length : 8
------------------------------------------------------
Uninstalling gcc.