seems there is an bug in any (Linux) Package and the Fake KMS option.
Since yesterday I ran into an issue while booting - the display stay black and there is no output.
I troubleshoot it and after a while I remove “dtoverlay=vc4-fkms-v3d” from option.txt (on the SD).
I can reproduce this Issue while doing a clean install (see: https://nymea.io/en/wiki/nymea/master/getting-started/raspberry-pi),
sudo raspi-config →
Advanced Options →
GL Driver →
GL (Fake KMS) and (?) aptitude upgrade the Packages.
So if you running in this Issue, try this for solving.