Use Joycons with Steam on Linux
Steam appears to support Joycons. They connect individually but not as a single combined controller. There is a toggle in Steam > Settings > Controller for combining Joycons, but it doesn't do anything. The UI here is also a bit weird because the button appears twice. Looking online there is a suggestion that you need Steam Beta. This doesn't make a difference. The solution was to install this driver: https://github.com/DanielOgorchock/joycond After installation, when you connect a Joycon or Pro Controller, you tap the L and R buttons to tell the driver how your controllers are combined. Now steam recognises it as a single controller. However you will need to connect the controller this way before you start Steam (even for your Pro Controller, which you previously would not have needed to do).