Foot pedals. I'm using one with three axis for flight simulation. One day I ran linux on the computer they were connected to, not "using" them, just connected.

Foot pedals. I'm using one with three axis for flight simulation. One day I ran linux on the computer they were connected to, not "using" them, just connected. Suddenly, without any warning, my screen turned left/right/upside down like it would on a tablet. After the initial surprise it took a bit of time to figure out that it was caused by stepping on the pedals. And even more time to figure out that anything unkonwn with three axis is considered an accelerometer, and that an accelerometer defaults to turn the screen in gnome. It was a long time ago. I haven't checked recently if there's finally a hwdb or whatever is needed for systemd to do some meaningful mapping.