You missed ‘sudo’ in front of ‘vcdbg log msg’
The command should be ‘sudo vcdbg log msg’
Can you add ‘xohms=1’ to the config line in /etc/config.txt so i appears line the line below;
dtoverlay=piscreen,speed=16000000,rotate=90,xohms=1
and then rerun ‘sudo vcdbg log msg’.. and also test if you see any events with evtest
Mark --OzzMaker.com --
