So I’ve done another clean Ubuntu Core install, did snap refresh and snap install --edge mir-kiosk and got the black screen with a blinking underscore cursor.
This time tho, here are the logs you’ve asked:
Changing the dtoverlay from dtoverlay=vc4-fkms-v3d to dtoverlay=vc4-kms-v3d makes Rpi4 unable to output any signal to the monitor. It’s black with my monitors no hdmi signal message.
Also snap command is not working for some reason after trying to install nano snap and rebooting.
$ snap logs -n 100 mir-kiosk
gives
error: cannot communicate with server: Get http://localhost/v2/logs?n=100&names=mir-kiosk: dial unix /run/snapd.socket: connect: connection refused
The rest of the snap commands just hang and show empty line.