I’m trying to setup a Unicorn pHAT on a Pi 3 running Retropie. The software seems to install correctly, but when I run a sample script, I get completely random lighting on the Unicorn pHAT: see this video.
I updated everything with
apt-upgrade, then updated Retropie (with an updated script) using the binary based installation. I ran the Unicorn Hat setup one-liner, with no errors.
I tested the pHAT on a Pi 2 running Raspbian Jessie, and it worked perfectly fine.
What other trouble-shooting steps should I take?