I've used the Raspberry Pi Imager utility to download and install Ubuntu Server 20.04 x64 on an SD card, and added
usercfg.txt before booting up.
This worked just fine for Raspbian OS (except the file modified in that case was
config.txt) and yet, I don't get a console or any output whatsoever after the four-pixel color test appears and disappears.
The monitor does not go to sleep - it maintains a blank screen and an active display. I can still shut it down with
Alt+Fn+SysRq+O but nothing else produces any output, only the low-level BIOS shortcuts like SysRq and
CTRL+ALT+DEL trigger any response.
I apologise if this question has been answered, I was not able to find it. Could anyone suppose what mistake I am making?
- I've tried adding a static IP to the netconfig (optional: true) and
SSH is 'not able to find a route.' Notably I did not add an
sshfile to the boot partition at the time.
- I've tried more specific HDMI settings, forcing it to my native resolution with reduced blanking - no change.
- I've deleted the Imager's cache and re-downloaded / re-verified the SD card, with the same results.