I’ve installed debian on radxa rock cm3. When i plug HDMI i see debian gui on the screen. The problem is when im trying to run tool ‘glxgears’ it give me error - “Error: couldn’t open display (null)”
Xorg running -> /usr/lib/xorg/Xorg :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
Thanks for any help