Update: The error on that issue wasn’t the one I had, but the command was the one that ended in Neptune 611, so I did use it.

Ran the debug install again and no dice.

Rebooted and reinstalled, then back to gaming mode, and now it’s working. I knew from several mentions that it might take a couple reboots, so even though it felt weird to need to do it more than once, I still did, and it seems to have paid off.

Now I’ll still have to switch the dongle back and forth from my PC for now (until I get my hands on the new steam controller), but I can live with that.

Although as soon as I get it paired and working, I see a new steam os update, so I’ll probably need to do it all again anyway. But at least I can trust the process now.