I’ve asked about this under Linux, but after 5 days, there are no responses, even after I asked if there was something confusing about my post that I should fix.
I am using RetroPie on a Raspberry Pi 3B+ and have a trackball and spinner connected via USB. Earlier I had those and a mouse connected. I found that no matter what I did, even after verifying everything worked, I cannot get RetroArch to see more than one mouse device.
When I had the mouse plugged in, it would see the mouse (at /dev/input/mouse1 - forgot what event node it was attached to). When I unplugged it and had just the trackball and spinner plugged in, it would see just the trackball and is totally unaware of the house.
My mouse is at /dev/input/mouse0 and /dev/input/event3. The spinner is at /dev/input/mouse1 and /dev/input/event6. If I set
input_player1_mouse_index to 0, then when I try any games, I can use the trackball. If I set it to something else, then the trackball doesn’t work and neither does the spinner. I’ve tried setting the index to 0,1,3, and 6 - to cover the input and event nodes. No matter what, no games that use RetroArch ever see the spinner.
I have read about having two mouse devices on at once, but most of that seems to be about using 2 light guns at a time.
I don’t need to have the trackball and spinner both work in the same game at once, I just need one at a time.
How can I get RetroArch to see the spinner as well as seeing the trackball?