If you are using Gorgona image with an official Zynthian Kit, you could have problems with the new touchscreen functionality that is activated after updating the software from the admin menu.
This is a description of the touchscreen functionality that you should get after updating:
If you don't have this new features after updating, then probably your touchscreen is not working correctly and this is the explanation:
Recently i have detected a problem affecting some touchscreens when attached to the Aluminum Case. The problem is related to the border of the touch-surface beeing pressed by the aluminum frame when tightening the bolts.
In order to get the touchscreen working correctly, you may have to play with the bolts and the screen position until it's correctly aligned and tightening. Sometimes it's not an easy task. Sorry. The next revision of the case have a slighty bigger window for the screen that should solve the problem.