@cyclair Probably not enough. The link clearly asks for some logs and config files so that we aren't pulling things out of thin air. To be clear, with pretty much thousands of people running and playing vertical games on the official image, especially on the RPi3B that's been around for quite a while, I would vouch for the fact that what you're facing is pretty much configuration issues from that exact image.

But do share more details per the link shared above - type of screen you're using, etc.