A small part of the MichMich set-Up instructions:
ℹ️ Activating the Open GL drive can also be accomplished by using the raspi-config tool by running sudo raspi-config. Go to the Advanced Options menu and select A7 GL Driver. Next, select the G1 GL (Full KMS) OpenGL desktop driver with full KMS. Note that this option will be selected in the menu even when the GL drive is not yet configured. Unfortunately, as a result, the display_rotate=1 (see below) won't have any effect on the display. If you want to rotate the display when the Open GL driver is in use, we need to use the xrandr tool which allows us to rotate the display when in desktop mode. To do so, edit the autostart file: nano ~/.config/lxsession/LXDE-pi/autostart And add the following line: @xrandr --output HDMI-1 --rotate right
That should solve your problem.