These controllers were all working on SteamOS before as far as I know, so I’m interested to see what this changes. My understanding is that previously their controllers just show up as generic xbox controllers, and now they will be properly recognized. We’ll see if this has any other benefits like custom bindings for back buttons and things like that.
Having the same issue and I don’t know how to update to the latest firmware without the app.
Someone mentioned fwupd in another comment. I haven’t tried it, but hopefully it works.
It doesn’t.
Limited hardware support for fwupd. Mostly older models, ones mentioned don’t appear to be compatible.